Diesel- always seems to have the best quality/look for the cost; though as of late they've missed a beat it seems. Still plenty of awesome model/washes were released and readily available in the past 6-8 years
I've also found some decent jeans in Dsquared; Good denim, and I like some of their cuts really well; lower rise jeans seem to fit me better and it's hard to find a good quality one. Only problem is finding pairs that aren't too gaudy or can easily have the gaudy details removed.
Other than that, a couple random old pairs of Energie, Earl, Valentino, Levi's, Lucky have managed to hang on somehow in my wardrobe, though rarely get pulled out much
I'd like to try Dior, but the cost and lack of availability is prohibitive.