POPO eats him. littrally .
i don't see why not ,yacjirobi ate King Piccolo's son which makes hima namakian too so
Yajirobe is a murderer.
I highly recommend you read the Gantz manga, It's way better then Attack On Titan. The anime is alright, but it's not that good because it only covered about 90 chapters. Yu Yu Hakusho is another great series with both the anime and manga. If you're into comedy i would also give School Rumble or Azumanga Daioh a try.
I think the Kudos have a shot.
Lelouch has better feats.
@ImDictatorBowDown: We don't know the size of our universe, only what we can see aka the known universe. Most top physicists think the universe may be infinite or at least way bigger then the known universe. In the case of the DBZ universe you're probably right since Toriyama said he wanted to make it small.