Don’t think I have tried all of the options and guns yet but from what I have used I’m really impressed and enjoy the Sniper “Bipod” alternate shooting mode and the Rocket Launcher “Big Boy” alternate shooting mode. Those two would be equal for me.
Sniper: Even with Zero or Mordecai I’ve never been good at sniping but with this mode I’m getting headshot after headshot with my Moze character. (And never running out of ammo!)
Rocket Launcher: It’s basically a Fatboy from Fallout. Nuff said