I love all of Daft Punk's albums. Homework has some amazing house tracks, Discovery took Thomas and Guy-Man's influences and turned them into something new, Human After All is real intense driving electronic rock, and Random Access Memories is a masterpiece that takes the disco and funk stylings of Discovery and turns them up to 11, along with capturing so many human emotions.
Those are all pretty good, but Alive 2007 is the pinnacle of live DJ sets. It has some of the greatest mashups I've ever heard, a standout is the mix of
Harder Best Faster Stronger and Around the World, I just love the transition from Steam Machine into Around the World so much, how the lyrics start fighting each other near the end, and how the crowd sings along the whole time.
The Daft Club and Musique Vol.1 1993-2005 albums have some great remixes and weird little songs people forget about, including some of my favorite Daft Punk songs like
Aerodynamite and
Mothership Reconnection
If you like Daft Punk a lot, then check out some of Thomas Bangalter (1/2 of daft punk) old stuff like
Music Sounds Better With You,
Colossus, and
the remix of DJ Mehdi's Signatune
If you run out of Daft Punk (like I have), then groups like Justice, Televisor, The Reflex, and many others might be able to satisfy your needs.
As for my personal favorite Daft Punk song, it's probably
Voyager
Also OP, watch Interstella 5555.