This is alive Minato with KCM. Who does he beat? NOT IN ORDER
Sandaime Raikage - Multiple ways to defeat him, kcm not needed. RDS is one. Another is to mark him so he cant escape food cart destroyer, then use shisho fuin/or gourd toad on him, or toad genjutsu. Should be able to form a mini tbb, since naruto almost made a tbb by accident in kcm on his first use, and minato has better chakra control than early kcm naruto. Or he simply outlasts, his chakra will continually be replenished by kurama
Killer Bee - Minato wins in base. Against a bijuu, minato will set up his markings via his shunshin as he did against the juubi. Once setting up markings across a giant perimeter, all tbb are useless and get easily redirected easily. Being in bm makes him an easy target to get marked. Sealing is also available
Edo Itachi - Never understood how alive minato loses. Dont care to argue this anyway, especially since the revelation of itachi being able to use susanoo via clones.
EMS Sasuke (no PS) - Minato med diffs. People always say enton stops minato touching his susanoo or that shadow clones cant reach him lol. Well not an issue now, chakra arms extent to make contact with susanoo. Teleports susanoo away, sasuke is a sitting duck.
6POP - He'd make short work of the other paths. Chibaku tensei gets teleported away. Pain inst as strong as nagato. CST needs to be charged up. Which he wont get the time to do. Kakasho figured out the 5 sec interval, so will Minato. And with shunshin + clones + ftg, that interval is easily bypassed.
7G Gai - Trolls gai with ftg and shadow clones. Kcm not needed. If gai charges full speed into minato, he's dead (pulls a raikage and flicks kunai above his head and marks/slashes him). Space time barrier takes care of hirudora, doubt gai will survive being hit by it.
Gokage - He can beat them all individually in base. With kcm chakra and clones, he defeats them all at once.