Deciding whether Minato would be better as the 4th Hokage or Orochimaru would be better as the 4th Hokage is NOT something that revolves around the Kyuubi incident.*
1) Orochimaru managed to survive the battle against Hanzo. Something that Minato could not do.
2) Orochomaru was part of Root with dealt with almost everyone who posed a threat towards the village. Minato was part of the ANBU commanded by the Hokage which in no way could even survive a single mission given to them by Root.*
3) Oh so Minato dodged the Raikage's punch? Orochimaru killed the 4th Kazekage and 3rd Hokage.
4) Orochimaru has mastered Senjutsu while Minato had not.*
5) Orochimaru's 3 subordinates: Anko Mitarashi, Kabuto Yakushi and Sasuke Uchiha have accomplished way more than Kakashi Hatake, Rin Nohara and Obito Uchiha
6) Minato died from using the Reaper Death Seal? Orochimaru was able to stop Hiruzen when he attempted to seal away Orochimaru using the Reaper Death Seal (Although he got Orochomaru's arms), Orochimaru survived getting absorbed by Sasuke, Orochimaru survived even though he was sealed by Itachi's Totsuka Sword and Orochimaru survived even though he used the Reaper Death Seal: Release.*
7. So Minato created the Rasengan? Now let's compare Rasengan to Orochimaru's Living Corpse Reincarnation, Shedding Skin, Cursed Seal etc. (Yes, it was Orochimaru who had created the Cursed Seal, Juugo had not. Juugo simply possessed its powers.)*
8. "OH and Obito knew Minato's jutsu as well being a former subordinate..and Minato still got him.."*
* * *Hiruzen knew about Orochimaru's techniques yet he failed to defeat Orochimaru.*
Minato has to be the weakest Hokage. You simply cannot claim that Hiruzen was the weakest just because of 1 battle. Hiruzen was old and had not fought for a long time. He did not possess the same power he did when he was young. Orochimaru was Hiruzen's favourite pupil and yet he could not kill Orochimaru even at the time he had realized that Orochimaru had betrayed Konoha. Even though Enma begged him to kill Orochomaru he still could not. At that time Hiruzen was a healthy man while during his battle against Orochimaru he was had turned old. He wanted to forget how Orochomaru had betrayed the village yet he fought with such great bravery and ferocity. Now look at Minato... Actually let's just stop this argument.*