From my research, my candidates so far are Outlier Slim Dungarees, Prana Brion, and Vuori Meta pants. I might checkout Kuhl, Lululemon ABC, fjallraven, and some golf pants.

For context, I recently lost the only pair of pants that I own (Vuori Meta), so I am basically pants-less. I loved Meta pants for it's thin and super stretchy-ness, but I have giant thighs, so their waist never really fit me where I can fit a literal fist in the pants.

The main usage for long pants will be 80% fashion (city/travel) and 20% outdoors/rock climbing and powerlifting only during the cold weather since I wear shorts most of the time. I sweat a lot, so thin/breathable material is preferred at the expense of durability, and need the stretchyness for the full range of motion of powerlifting.