Foobar2000, which is a Windows application but available as a snap using wine.
I really want to use DeaDBeeF because it is Linux native and has similar customization features (I like big album art, for example), but sadly its library management leaves a lot to be desired compared to Foobar’s. I don’t want to have to generate a playlist every time I want to listen to an album, nor do I want to have to clear that playlist when I’m done.
I haven’t found any other player with even remotely similar customization available.