The Alan Parsons Project
Awesome progressive rock group that was a mix of the WAY TOO over-popularized Beatles and very trippy Pink Floyd. Unlike the Beatles, APP is very relaxed and are less happy and have a cooler much less annoying sound to their music. The only similarity would be the vocal sound. They are much like Pink Floyd in their tune and mellowness. They are more in touch with the world than the too-happy Beatles were.
It's a shame that the Alan Parsons Project isn't as popular as the Beatles. They are way better and less annoying.