Re: the existence of jinn
Jinns that do take posession of a human’s body and use it to do evil are considered " bad jinns ". That would make them Shayateen. (followers of Satan).
Angels are not able to posess humans. They simply watch over everything we do.
I’m not sure what other creations there are other than:
Humans
Animals
Angels
Jinns
Devil(s) <<if you’re speaking of the spirit or the Shayateen.
Angels are higher than us because they do not sin. They are servants of God. Just as Jinns and humans are. I haven’t read anything that said that Allah (swt) created Jinn as a higher life form than us. (actually, i never came to think about the fact that they have more physical ability - as in being able to see us and we not see them.) :-|.