Bands with great second albums

So many already mentioned that I would have chosen. I will add Stand Up by Jethro Tull and Candy O by The Cars.

 Lynyrd Skynyrd - Second Helping

Led Zeppelin

Tough to put out a better second album than Radiohead's "The Bends".  Perhaps Nirvana's "Nevermind" is the right there with it.  In the jazz world I often prefer a bandleader's second album such as Ornette Coleman's "Change of the Century".  You can see these guys' confidence building after a successful debut is under their belt and they real start pushing it, in a good way.