I find PipePipe to be the most reliable of the bunch with the least amount of crashes. Also Piped and Invidious are website-based frontends that are unrelated to the NewPioe project.

Basically, you have NewPipe (the original), Tubular (a soft fork of NewPipe adding Sponserblock and such), and PipePipe (a hard fork also adding Sponserblock and allows optionally logging into a Google account for the purpose of cookie authentication).