I have a porter recipe on my profile that fits a pound of oats easily. Silly good recipe.
But like someone said.. find a recipe you like... add it. It would work for a nice brown ale, or a porter, a stout would benefit from it, but might get lost in there in some cases.
Honestly.. I'd do a porter, or just got nuts, and toss it in a pale ale. It won't add much flavor to it, especially if you do a 2 row, and say, a little munich and some crystal, but will have a head on it that literally sticks your glass and stays.
My vote is a porter though. Easy drinker, doesn't need a ton of stuff, and the oats I personally think, shine better in a porter than they do in a larger roastier stout.... but a lighter beer does intrigue me.