Unsure of what exactly your looking for, but here’s a list of bands that I believe are clean:
The Beatles - I’m sure you know this one.
Blind Guardian - German power metal band. Most of their lyrics are fantasy related (they have an entire album dedicated to Lord of the Rings. The lead singer is also Christian, probably Catholic. They have several Christian-themed songs.
Dream Theater - A progressive metal band. I’m not too familiar with them yet, but they don’t seem like the type of group to sing about sex and drugs. The band consists of Jews and Christians with the lead guitarist being Catholic, but I’m unaware of their lyrical meanings.
Iron Maiden - Despite a somewhat infamous reputation, this group is clean and intelligent. Many songs are about historical events, books, movies, etc. I can’t think of anything specific dealing with drugs and sex. While Bruce Dickinson may swear in concert, they don’t in their music. They have some songs on religion which might be a bit negative (one line referring to Catholic greed in the song Montsegur), but they’re based on historical truths. There’s a song called For the Greater Good of God which is about fighting wars in God’s name, but ends with the lines “He gave his life for us he fell upon the cross, To die for all of those who never mourn his loss, It wasn’t meant for us to feel the pain again, Tell me why, tell me why”. Also, the song Sign of the Cross seems to be about redemption. The band members keep their personal beliefs secret, but the drummer is a practicing Christian.
Savatage - Another great metal band (if you’re into that thing). Their earlier, more metal songs have some sex and drugs references, but their entire second album (actually an EP) uses metaphors of hell to describe the use of drugs. Their later stuff is more progressive and you’d probably enjoy the album Streets: A Rock Opera which has a hopefully sound throughout (and isn’t really even metal). Also check out Trans-Siberian Orchestra, the group they morphed into. Savatage’s first lead singer now has a group called Jon Oliva’s Pain and his Global Warning album contains a lot of hopeful religious messages and mentions of Christ (but also has some harsh screaming in a couple songs).
The White Stripes - An indie, blues-rock duo. Amazing guitarist in Jack White and they have simple lyrics. Nothing religious, but also nothing overtly sexual that I can think of.