I like Lupin the most, and I’ll give you three reasons:
1. He was a good professor
He taught Harry how to fight dementors off, that was good
2. He’s smart
He’s probably smarter than you think. I think he’s the smartest out of all of the Marauders.
3. He’s nice
He didn’t bully Snape, nor did he stay on Snape’s side. He was just neutral.