I started at 265 lbs., 4 years ago. I lucked up and the seller of the first bike I bought threw in a Selle SMP TRK saddle that felt good immediately.
https://www.biketiresdirect.com/prod...k-saddle-large
Since then (June 2017) I've ridden over 26,000 miles on my road and gravel bikes. I've ridden 32 centuries and a *bunch* of metric centuries. I have this saddle (in "Large") on all of my bikes.
I just bought a 2021 Salsa Warbird that came with a WTB saddle. It felt bad in the parking lot! I bought a new Selle (same link as above), put it on and as soon as I sat on it, "AHHHHHHHH!"
Good luck! Seems we all have different posteriors and like different things, but this plain, "heavy" and simple saddle has been wonderful to my buns!
Gary