Just re-read this excellent piece from The Quietus (which is a couple of years old but just popped up on their Twitter)
I love a good compilation and there are some really excellent ones in the piece - I would heartily endorse the choices of Personal Space, Bangs and Works, Disco not Disco, Hip Hop Don’t Stop, Nuggets and all of the Soul Jazz ones they include.
Can we add anything to the list? These are various artist compilations (so no Best of The Beatles) and ‘single genre’ (although I’m not really sure what they mean by that and certainly won’t be policing it). Ideally things that opened up a new area or niche of music to you.
I’ll post a few through the day as I think of them - if you add one include a description and, if possible, a favourite track from the compilation.