Minato wins even if Madara has kurama summoned (doesn't even make sense but oh well). Minatos KCM clone can even handle it. Either via sealing or contract seal or whatever. lol at people who still think ps is above kurama avatar. Ps can't tank Juubi laser, not can it move remotely near the speed that kurama avater can, and ps can't even dish out the same amount of fire power that kurama can. Ps slashes are its best weapon. Yasaka Magatama is slapped away by tails or redirected back at Madara with space time barrier. Kurama avatars most powerful tailed beast Bomb, equates to the power of 5 bijuu's combined tailed beast Bomb. Add to the fact that Minato can add senjutsu to that, well then go Madara. Madara has no defence to multiple tailed beast bombs either. It'll crack open his Susanoo and get him blitzed via FTG lv 2.
If Minato can mark with chakra arms, then this is honestly low diff.