Minato is a really powerful shinobi, but here are some candidates with a good chance of beating him.I decided to exclude real madara.Minato does not have sage mode(until manga proof).Minato does not have a unlimited supply of kunai.He has about as much as he can carry(15,20).If he teleports somewhere very far(home)then it will count as a loss.Minato can use reaper deathseal but only if he thinks there is no other way he can win,if he does use it and it is successful then it will be a tie.
1)4th raikage(A).This battle can go to either person and A's speed isn't that far behind minato's.A can also outrun reaper deathseal.
2)Killer b.Hard match up for minato because killerb specializes in area attacks.He too is quite fast and can use TBB to wipe out all the kunai and minato.
3)Jiraiya.Sage mode is the deciding factor in this battle and it all depends if jiraiya can keep it up long enough to take ot minato.
4)Onoki.Minato can't get onoki if he flies and then onoki could unleash jinton. Onoki could also break the ground scattering minato's kunai.
5)Danzo.Minato knows about izanagi but not how many times he can use it.Danzo could suck in the kunai that are on the ground with his summon(Baku).Danzo
6)Itachi.Minato could dodge ametarasu,but he has to avoid itachi's eyes.He could also dodge totsuka but the yata mirror would protect itachi.I honestly don't know who would win this.Can yata mirror block reaper deathseal?
7)Nagato.I think nagato would win this one,if minato gets close shinra tensei or soulsuck if he stays away then bansho tenin.If minato uses reaper deathseal then he could use chibaku tensei and the gravitational pull will make it hard for it to hit nagato.
8)Muu.Minato has know way of knowing when and where Muu will attack if he is invisible and hides his chakra(except his instincts).Jinton could also quickly kill minato.Muu has not got a very good defense though and i think a few strong rasengans could take him out if minato does it before he flies.
9)3rd Raikage.Minato has no way of knowing how the 3rd got that scar and the 3rd is also quite fast.One hellstab could take minato out and he might not even give minato time to place the kunai.He could also paralyze minato with black lightning.Minato's rasengan can't hurt the 3rd Raikage either.I also think the third could outrun reaper deathseal or blitz minato while he is preparing it.
10)Tobi(rinnegan,only 2 paths).Since tobi can only use 2 paths then i think minato has a good chance of taking them out before they use tailed beast forms.If he does take out the 2 paths then he could take out tobi.,but that's if he even gets to that stage.
11)Hiruzen(prime).We don't know how strong hiruzen might have been in prime so let's just say in prime he has much better chakra levels(near kisame).I think this battle will be a tie and one of them will be forced to use reaper deathseal.
12)Naruto(with all kyuubi modes up to 6-tails,sage mode,chakra mode).Minato is faster than naruto but naruto has more destructive power.Another tough fight and minato will probably be on the defense for most of this fight.Minato will probably be forced to use reaper deathseal.
Please comment on which battles you think minato would win,lose or draw and how.

1)4th raikage(A).This battle can go to either person and A's speed isn't that far behind minato's.A can also outrun reaper deathseal.
2)Killer b.Hard match up for minato because killerb specializes in area attacks.He too is quite fast and can use TBB to wipe out all the kunai and minato.
3)Jiraiya.Sage mode is the deciding factor in this battle and it all depends if jiraiya can keep it up long enough to take ot minato.
4)Onoki.Minato can't get onoki if he flies and then onoki could unleash jinton. Onoki could also break the ground scattering minato's kunai.
5)Danzo.Minato knows about izanagi but not how many times he can use it.Danzo could suck in the kunai that are on the ground with his summon(Baku).Danzo
6)Itachi.Minato could dodge ametarasu,but he has to avoid itachi's eyes.He could also dodge totsuka but the yata mirror would protect itachi.I honestly don't know who would win this.Can yata mirror block reaper deathseal?
7)Nagato.I think nagato would win this one,if minato gets close shinra tensei or soulsuck if he stays away then bansho tenin.If minato uses reaper deathseal then he could use chibaku tensei and the gravitational pull will make it hard for it to hit nagato.
8)Muu.Minato has know way of knowing when and where Muu will attack if he is invisible and hides his chakra(except his instincts).Jinton could also quickly kill minato.Muu has not got a very good defense though and i think a few strong rasengans could take him out if minato does it before he flies.
9)3rd Raikage.Minato has no way of knowing how the 3rd got that scar and the 3rd is also quite fast.One hellstab could take minato out and he might not even give minato time to place the kunai.He could also paralyze minato with black lightning.Minato's rasengan can't hurt the 3rd Raikage either.I also think the third could outrun reaper deathseal or blitz minato while he is preparing it.
10)Tobi(rinnegan,only 2 paths).Since tobi can only use 2 paths then i think minato has a good chance of taking them out before they use tailed beast forms.If he does take out the 2 paths then he could take out tobi.,but that's if he even gets to that stage.
11)Hiruzen(prime).We don't know how strong hiruzen might have been in prime so let's just say in prime he has much better chakra levels(near kisame).I think this battle will be a tie and one of them will be forced to use reaper deathseal.
12)Naruto(with all kyuubi modes up to 6-tails,sage mode,chakra mode).Minato is faster than naruto but naruto has more destructive power.Another tough fight and minato will probably be on the defense for most of this fight.Minato will probably be forced to use reaper deathseal.
Please comment on which battles you think minato would win,lose or draw and how.