The Wrangler Cowboy Cut jean is a classic, too. They're less obvious, but built for daily work. Riveted seams, high set pockets (so as not to interfere with the saddle), leg openings designed to be worn with boots, etc.
They really were designed BY working cowboys FOR working cowboys.
Carhartt is excellent, too, but focuses more on the building trades. It all depends on the look you want.