I wouldn't say there are a lot. Among pure PoW coins I only know of Dogecoin, Monero, and Grin. Of those, Dogecoin and Monero have tail rewards at 1% and 1.7% (respectively) of initial rewards, while Grin has an eternal emission of 1 Grin per second. Kind of shocking how it took more than 10 years for the simplest possible emission to be tried...