I use Reeder on iOS and Mac.

Fluent Reader. Choose Fever API as a service to use FreshRSS.

I use FeedMe.

I really like Newsflash on Linux. Clean interface, scraping built-in. I also found Feedreader in my repo which looks promising, but I haven’t gotten around to trying it yet.

Removed by mod

It would help if you mentioned the ones you tried and what you didn’t like about them, what features you’re looking for, etc. I still haven’t found the perfect client myself.