Talos Principle is a very pretty game that is a great recommendation if you like puzzle games. I played it with mouse and keyboard, but I would expect it to play very well with a controller due to it's simple controls.
Games like Fallout and Elder Scroll games are great if you want to put lots of time into mods, as you can do a lot of cool things with both on PC that you couldn't do on console.
You can probably play XCOM games with just a mouse, if you do need a keyboard, it's for a minimal number of keys. It's turn based, so you don't need a great mouse surface, a wireless mouse on a couch or coffee table would work fine. XCOM games are a lot of fun.
Aside from Talos and Bethesda mods most PC games that would qualify as must haves and have good controller support are likely to already be on a console because they're essentially console ready at that point.
[–] Radial 0 points 1 point 1 point (+1|-0) ago
off the top of my head,
The Witcher series, Dark Souls with dsfix mod and hi res textures, Bastion and more indie games than i can count.
If you just want a list of PC games with controller support you can search on steam for that
http://store.steampowered.com/search/narrow_category2#sort_by=_ASC&category2=28&page=1
[–] Alybad ago
Europa Universalis IV. Best. Game. Ever.