Typically they can eat fish 1/2 their size. The 2 bigger ones pose a problem for all of the ranges you have listed...but if you have plenty of forage, you shouldn't lose too many.
When I stock LMB, I only put in adults in the 12-17" range, and I'm very selective about only putting in fish that exceed 100% of their RW. I like to think I'm stocking only superior growth genetics.
