Levi's "Shrink-To-Fit" 501's might be what you are looking for http://www.amazon.com/Levis-Mens-Sh...24529&sr=8-1&keywords=levis+shrink+to+fit+501 Here's a good guide on how to shrink them. http://www.primermagazine.com/2012/...-to-shrinking-the-classic-levis-501-stf-jeans
OP, try "Relaxed Fit" jeans in a straight cut from brands like Lee, Wrangler, the GAP, and Levi's. If you can lose the weight, look at APC, RRL, and Naked & Famous. Finally, if you want top-quality and are prepared to pay the price, 45 Rpm or Samurai denim. Pay attention to the rise if you have a beer gut. Sounds like your thighs are somewhat large so avoid tapered cuts.
I worked for almost 20 years at the Gap. Additionally, I have short legs and larger than normal thighs. I understand completely what you're asking for here. I always wore either Standard or Relaxed fit jeans from the Gap. Never felt like they were snug. Price is much better than some brands like Lucky. One downfall is that I wore them through too quickly but that was more because I was constantly on my feet than any fault of the jeans.
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This. There will never be a better fit than a good old pair of 501s. And they get even better over time. Even moreso for the Shrink-to-Fit.
A seersucker suit looks very stylish. I know a few lawyers who wear them in the Carolinas with white suede bucs or spectators. A great option if you have to wear a suit and tie to work, but live in a hot and humid area like Savannah or Houston where even tropical wool is sweltering.