While Warframe is a perfect example of a well done FTP model, you can buy a lot of stuff with real money in Warframe, it isn’t just cosmetics. But it has limited PVP and the community is fairly friendly, so it isn’t so much Pay-To-Win as it is Pay-To-Not-Work-Hard.
When I played the original Fatal Frame it was unlike anything I had played at the time. The Penumbra series was also up there.
These 2 series lead to me realizing I disassociate when I watch or play horror and I stopped consuming that genre.