Doubt that, Anko who trained under Ororchimaru wished Minato was still alive to beat Orochimaru, then Hiruzen said Minato died protecting Konoha and now it's their turn. Orochimaru can't land a hit on Minato, especially if A couldn't. And you have your facts wrong, Orochimaru would recieve a lot of damage from Rasengan but he can shed his skin to recover. Sheding his skin cost a lot of chakra so overusage would be bad for him. Also If his head is cut off then he'll die, he can only pull himself together when cut in half by he waist and recover lost parts (arms or legs) from sheding. Kabuto who can heal himself was hurt badly by Naruto's rasengan and Minato's rasengan is larger and stronger than Naruto's.
The 8 triagram seal seals chakra. Contract seal will break Orochimaru's control over the snakes so no more snake jutsus (Orochimaru can only use them because of his snake contract, Sasuke couldn't use the jutsus after he broke ties with the snake and became the hawk.). Now since you are comparing Orochimaru who lived 16 years longer than Minato and seem to forget Minato sealed half of Kurama's chakra inside himself. If you take the fox chakra out then take out Orochimaru's hands (jutsus). Edo tensei is not at Kabuto's level and Minato would be able to seal them. Hiruzen fought Hashirama and Tobirama and was close to them when they were fighting in close combat so Minato can seal them. Orochimaru's limit for edo tensei was 3.
another useless post; Anko wished Minato was around to par with a man he once knew, the Oro she knew half the techniques in which we all knew he to have. Also, Oro was condidered Hokage before Minato prior to knowing (regeneretion, Edo, real form, etc), just pure skill. Btw ppl get confused, the only time Oro "sheds" his skin is when his current body is no longer mobile He didnt shed his skin when his face got slapped of by the Kyubbi, cut in half nor after punches from Tsunade. Unless rasengan leaves him unmobile, he wouldnt need to "shed skin."
8 gram takes time and prep, shyt Oro could use 5 element seal on his ass at the same time, and neither would have chakra lol. Contract seal would work for those who are being forced to take command, Oro's snakes wouldnt abandon him, just as Toads wouldnt abandon Jman. The 3rd lost his life in the process and he was aware of the 1st and 2nd Hokage, thus using the same techniqure that Minato would have to resort to.
Btw dont forget 8 branch techinque, which is said to be his strongest attack, or the fact that he can release poison in his really form, or genjustu and sword ability