Other than Zeppelin being my number 1 band:
70-80's Rock:
Black Sabbath, Creedence Clearwater Revival, Aerosmith (Pump album and earlier), AC/DC, Overkill, The Rolling Stones, and Queen
90-00's Rock:
Pearl jam, The Black Crowes, Guns N' Roses, Stone Temple Pilots, Big Sugar
00-10's:
Sam Roberts Band, The Trews, Sloan, The Sheepdogs, Arkells
There are some great new bands that are getting added to my favourites:
Greta Van Fleet, The Glorious Sons, The Record Company, Reignwolf, The Struts, Royal Blood