Do you want to compare Grim Reaper with Sgt. Rock? Discover the powers, weakness & weapons of Grim Reaper and Sgt. Rock from Grim Reaper Biography and Sgt. Rock Biography. Find out all about Grim Reaper and Sgt. Rock.# Check out how is Grim Reaper unique and distinct from Sgt. Rock. Discover their love interest, sidekicks, family tree and the movies and games list in which Grim Reaper and Sgt. Rock have appeared. Find out everything about them here!