Hi, the best I know is Q token from Qurator. For owning it, you receive the daily payout in STEEM. You get worth approx 20-40% p.a., depends on a few things. If you delegate SP to @qurator, you also get free Q tokens every day. Definitely the best economy of the tokens I found.
My next tip is RORS token, because it will be used in Road Of Rich STEEM game, which is being developed and it should be really good blockchain game. Check it out also.
I also like NOBEL token, because it supports charities.