Paul Farquhar
Legend
Got blown up by Hawkeye, and smacked by Jane Foster.Went toe to toe with captain America and thor (movies), frost giants, multiple elves (some trickery but a lot was hand to hand). took a beating from hulk and survived (was a quick google search and watched a short video).
Loki is the party wizard, his fighting skills are mediocre at best. Cast Mirror Image and poke with a dagger. He is hard to kill, but that's about it.