I've got very large quads, so I have issues finding pants that fit my both my legs and waist without them having to be tailored. Normally, in order for pants to fit my quads, they have to be 3+ inches too big in the waist.
Levi 541 - Good, reasonably priced jeans that don't cut off circulation to my lower legs. Come in a variety of washes.
Barbell Apparel - Ridiculously expensive. Never would've bought them for myself initially, but I was given a pair as a present. They are the most comfortable pair of jeans I've ever worn. Come in a boot cut too if you don't want the hipster look.
Cinch and Ariat - Very hit-or-miss for me, but I have a few pairs from them that I like.
Lucky - I like their jeans a lot, but it's almost impossible for me to find a pair that fits.