Ireth
Myth Weaver
Royalty didn't figure in The Hobbit but Frodo and Sam could not have ruined Sauron's day without a lot of help.
You're forgetting Thranduil, King of Mirkwood, as well as Thorin, King Under the Mountain. Also Lord Elrond of Rivendell is at least nobility, if not royalty.

Sage
Auror
Scribe