Jon Blow's first game was Braid, it is pretty amazing. (he has other projects on his site, but they are unfinished)
Crytech's first game was Far Cry, which is very good.
Treasure's first game was Gunstar Heroes, which is a cult classic.
There are some truly talented individuals from the start. Hence why I don't accept the "your first games will suck" teaching that some game design books choir about, since it's an unnecessary demotivator that isn't a certainly. Some people are great from the start, and other will need further training. Such is life.