Who should take the last place in my roster?

LamsterLou

Currently, as 4 stars, I have Killmonger, Hyperion, Iceman and Domino who have secured spots in my main roster but I’m having a hard time deciding between who should be the 5th champion, this is between:
Heimdall
M.O.D.O.K
Doctor Octopus
Wolverine

Who would you rank up and put in the roster and why?

DRTO

Heimdall would be good for the synergy he offers, Doc oc is a good power control champ which you don't have on your roster yet, and wolverine is a good regen champ that will be sustainable for questing. I think personally I would go for Heimdall cause the 4 you have right now are killers so might as well just make them stronger.