From comics, Rick Flag. From the movies, either Ratcatcher II or Bloodsport.

Either Harley, Captain Boomer or Bloodsport

Harley Quinn

There was no point in adding Katana to that movie. At all.

Captain Boomerang, he is in my top five DC characters too.

My favorite member of the suicide squad is either deadshot or katana

Bane.

Clock king

Deadshot

Captain Boomerang