Which Jedi/Sith died peacfully (Of natural causes).

it seems like only Yoda... and Ragnos.

And Dookus head fell off from old age.

out of all the movies yoda is the only character, force user or not, that died naturally. i cant even think of any from the comics. it looks like their all destined to a premature, violent end. it could be argued that obi wan wasnt killed and died peacefully as he disappeared and became one with the force before vaders blade made contact. but i wouldnt count it.

^What Decay said

Yoda, Marka Ragnos apparently...and Obi-wan Kenobi because getting sliced in two kills one naturally

Maul died pretty naturally. So did Qui-Gon. he went into a Force-Induced coma, then he spontaniously conbusted 😐

Obi-Wan wasn't actually sliced in two...he vanished just a fraction of a second before Vader got him, or so it seems.

Ackbar dies of natural causes later on, as does Mon Mothma.

Pellaeon, by all rights, SHOULD be very dead....how old is that man?!

don't know if it falls into what ever specifications you've made, but it looks like Quinlan Vos will get to live out his life in relative peace, he's got a women, a son, and the empire thinks he's dead, so he's pretty much set.