I started using Foobar roughly 20 years ago after migrating from Winamp and it’s still what I use today. The customization capabilities and selection of plugins for just about everything is pretty much unmatched. I will admit though, the initial learning curve can be pretty intimidating and frustrating until you get the hang of how it all works. Once you do though, I doubt you’ll ever be as happy with another music player.
I’m a big fan of Fractal’s Meshify 2 (or XL version depending on the parts). Easy to build in and clean, breathes well, tons of options for just about every configuration you could throw at it. I’ve used it for multiple builds and will always recommend it.