Minerva de Sade
I feel like Finn doesn't need to be with anyone right now. He just got out of the relationship with Flame Princess a short time ago, and he's still sorting out his feelings for Princess Bubblegum a little bit.
I think he needs some time by himself to do some introspection and all that. He can still be friends with them both obviously, but Finn needs some Finn time.
I totes ship PB/Marcie though.
I agree completely, and I think he shouldn't go out with either. He's better of adventuring and just staying friends with everybody for a while.
And yes! PB/Marcie all the way!