I had the smae issue as you did looking for a passive income coin.  The best one I could find is Neblio.  Its ranked around #170 and its coin ticker is NEBL.  It pays a massive 10% POS however not everyone stakes tso the inflation rate is around 6%.  The great thing is there are only 14 million in the total supply.

Neblio is a work class blockchain geared towards enterprises that is tech wise every bit as good as the big market cap projects if not better.  This is a true diamond in the rough.  Current price is about $1.80.  All time high $65.00. 

My favorite part of this coin is calculate how much a month  I will make if we ever go to 10% of the old highs.  You can really move ahead if things play out right and your holding this coin.