Strongest character that Luke could best armies of
Essentially, what is the most powerful character that Luke could defeat an arbitrary amount of on an open field, provided that:
- we ignore stamina EDIT: in the long term. But he can't do his most powerful attack all day long, say his stamina recharges every 60 seconds enough to rejuvenate him were he just fighting with his lightsaber, and as much that is otherwise
- they can't combine their powers via meld/meditation/ritual/etc.
- Luke is going all-out
- we ignore the possibility of flukes/Luke eventually making a mistake from sheer statistics/etc.