Sounds like you wouldn't enjoy Descent of Angels. (I know I didn't...)
SpoilerFulgrim takes down two of his Primarch brothers.
Sanguinious snaps a Bloodthirster over his knee.
Magnus the Red - despite being known as the Sorcerer Supreme - fistfights Leman Russ to a standstill while he has half a mind on teleporting 1,000 of his Astartes across the galaxy and into the warp.
Lion el'Johnson.... kills a Chaos Spawn. A feat later also achieved by a 15 year old mortal boy with a bolt pistol.