There are a few good ones, depending on what you can afford, what your cat likes, and what's available in your area. Grain-free is preferable, fish based foods should be limited to only a couple times a week, and I look for varieties without a ton of different protein sources. Wellness, By Nature Organics, Nature's Variety Instinct, Innova Evo 95% meat, some of the Precise flavours, Wysong, etc. Here is a good link for what to look for in a commercial food:
http://www.catinfo.org/commercialcannedfoods.htm