The only thing he has going for him is the undeniably cool looking suit of armour. Apart from that he does absolutely nothing noteworthy, and in TESB they only call him “bounty hunter”, just to show how little Lucas thought about him.
This is the most grievous misconception in the Star Wars fandom. People really need to go watch ESB and see how much “”“nothing”“” he does.
His treatment in RotJ is inexcusable, though.