minato only showed the death god sealling jutsu, so your whole argument is based the jutsu minato learned from his wife ?? do you even know what it is or how it works ?? a fight between two edo's will come down to the sealing jutsu they have otherwise the fight will go on forever. so lets say that minato will go on a fight with each one while both sides having a partner with sealing techs :
- kabuto, if you count the edo's in his arsenal then minato will drown in his army (the army that offers offence and defence) while kabuto is coming up with a strategy and ya ..... he has his own power, so kabuto with his army of edo's is by far the strongest.
- edo madara, would EAT him.
- edo hashi, minato doesn't have enough fire power for this dude (regeneration without the hand seals plus the edo tensei's regeneration) minato will fuss a bit, but it won't happen specially with hashi's mokuton (can play with the entire battlefield so throwing kunai's all over might not be a good idea).
- obito (rinnegan), would be fun to watch, so since i like minato i will say it can go either way (of course leaning towards obito).
- edo nagato, this is the only matchup that i would pay to watch, and honestly don't know who would win.