So, I just added a page to our wiki called Breathtaking Triumphs, which is meant to highlight the absolute best our community has to offer. I haven't frontpaged it yet, but I plan to do so soon. I don't think my initial choices should be too controversial. I assure you that if your game isn't on there, it's not necessarily because I don't think it's a staggering work of genius; I just wanted to get it started with a handful.
Nominate more games in this thread.