I know they can be seen as anathema to the serious music fan but compilations are part and parcel of music and we have surely come across some and even hold them dear to our hearts. I do not mean any self made comps but commercially available compilations. Here a few of mine that were/are vital listening.

What do you mean you have never heard of it? An essential mix of American Garage Rock singles from the 60's that provide a great history and evolution of the distorted guitar sound.

Just like it states on the cover. There is nothing truly mind blowing on here but it's a fantastic reminder and educational album as to the development of hip hop.

Many bands at the time of the NWOBHM only managed to make singles and no albums. This album collects as many lost gems as humanely possible. Classic.
One of the finest, funkiest bad ass Funk albums ever compiled. Chock full of rare grooves it makes we want to buy platforms with goldfishes in the sole