From Heroes:
-Thor managing to restart the Solar Forge with pure brute strength and durability. Amazing strength to start up a planet sized object is required. Suprised they displayed that level of power from Thor before they did Hulk.
-Thor surviving being the olive in a martini of pure harnessed star energy. Him not immediately being disintegrated and stripped of his skin is a miracle in itself. High display of durability.
-Banner surviving the New York battle with barely a scratch. I swear at some point a ca and some trees landed in him and he was almost unscathed. Prolly lil Hulk helping there but still. Honorable mention of durability.
-Spidey stopping Culls hammer
-Spidey actually putting the beats on Thanks and making him stumble.
-Iron Man making Thanos take a knee and bleed.
-Iron Man dropping a giant-man sized chunk of the ship on Thanos
-Hulk actually pushing Thanks back. (I'll give it to the big guy he's clearly embarrassed)
-Scarlet Witch pushing those giant razor wheel things off the ground.
-Thor's area clear.
-Panther knocking Cull back.
-Strange actually putting up a challenge to Thanos without once using the Time Stone.
-Drax being able to hold Thanos down.
-Cap actually surviving his meetin with Thanos.
-Widow putting up a fight against Proxima (trust me based on comics that should be a feat)
-Thor's hammer literally being unfazed by the Gauntlet and still striking Thanos.
Those are all the feats of strength I can think of. I wouldn't count anything from War Machine or Falcon because they were just mowing down baddies with weapons like they always do. Same for Bucky as well. I can't count Vision, he practically got his honey handed to him the entire film. And no one else involved is relevant enough to list in terms feats and power displays.
As for the Villains:
-Thanos breaking the Hulk down with his fists(btw to clarify this dies not make Hulk weaker, it just means Thanos is a better fighter and was able to get the upperhand and incapacitated Hulk before Hulk could do damage. He's assessed the threat was strong and disabled it before it could become a problem a massive display of not only strength but strategic ability. Had to get that off my chest lol)
-Thanos beating Iron faster than his fancy new suit could come up with ways to save him.
-Thanos beating Thor within an inch of his life.
-Thanos healing from having anitem that defied the infinity stones blast planted in his chest.
-Thanos in general was just a power house tbh.
-Cull Obsidian nearly wrecking Iron Man.
-Ebony Maw wrecking Strange.
-Cull Obsidian nearly wrecking the Hulk-Buster.
-Glaive taking down Vision everytime he came into contact with him with little to no effort. Vision was really being embarrassed in this film.