Anything arch, basically. Maybe I'm just a too lower tier power user, but I have always returned to Mint. Rock solid daily driver working out of the box. I don't really want to have to tinker with the os, I admit. It should just work.
I personally like the fact that u-he, acmt and audio damage provide their plugins on linux. I know, not FOSS, but game changing when it comes to switching music production over to linux. Vital is also available on linux, as is bitwig as host.