Hi phewd,
With your higher weights I would be very cautious with the 2" of 3 lb memory foam in the Leesa which I would consider to be a “weak link” in the mattress in terms of longer term durability. You can see some comments about Tuft & Needle, Casper, and Leesa relative to higher weight ranges in post #3 here (although you are not in the same weight range as the member that this replying to).
You can see the foam quality/density guidelines I would suggest in post #4 here. The mattress shopping tutorial includes several links to some of the better online options I’m aware of (in the optional online step) and post #4 here and also includes links to some of the better options I’m aware of in lower budget ranges as well.
Phoenix