So I've always hated Genesis, mainly because of Phil Collins...I never really liked their stuff when he was singing....But recently, I've been listening to the early Genesis albums on vinyl, the ones with Peter Gabriel, and I think it's clear that they were one of the original Prog-Rock Bands, along with Yes and King Crimson. My two favorite songs by them are: "The Musical Box" and "The Knife". Here are some clips. If you find them boring to start, just skip further into the songs, but listen to the build ups, they are amazing.
"The Musical Box"
This song has one of the most Diabolical guitar solos!