I disagree! There are pleanty of seemingly good titles on the Gamecube. Definitely get Wind Waker (try to get limited edition, that way you get Ocarina of Time / Master Quest) though.
I'd say get TP, but to be honest, it seems a lot more fun with a Wiimote than GCN controller.
Usually you can find some awesome deals of Gamecube packages with heaps of games and a couple controllers on eBay. At least, I've seen quite a few -- I might consider bidding on one just for the games.