LOL! Me too! Graduated Catholic HS in '77. I know exactly what you mean (Stairway to Heaven, Don't fear the Reaper, Adam raised a Cain, Rock me on the water, The Pretender, etc. etc.).
Great list of songs! I would add Lou Reed's Heroin - descent into hell - a touch of John Milton. "... a man cannot be free, of all the evils of this town, or of himself ... "
Stairway to Heaven- "When all is one and one is all" is simple Hindu monism. OK, I like the song too.
Don't fear the Reaper- The symbol for Blue Oyster Cult is an upside down question mark with a slash through it. This is an occult symbol called "The Cross of Confusion" which represents the questioning of Jesus' divinity. Didn't like the song that much either.