Schnee's Timberline have been my go to for a few years now. Not sure if they count as "lightweight" but with proper care and nixwax treating both pairs I've owned have been waterproof.
Great customer service if you end up not liking them. I tried the Beartooths in 2024. Packed out a spring bear in them and had issues with pressure points. They let me return them with a couple hundred miles on them (and bear blood) for the v3 pair at their recommendation. Had the same issue and they replaced with a new pair of Timberlines.
I'm tempted to buy a dozen pairs to last me a lifetime.
