I would not go by weight as to being "too heavy" nor comparing to other Bs.
IMO he is a very heavy-boned dog [i.e., lots of substance] and he could lose a hair of weight, but not too much… and hopefully it would leave his waist. Everywhere lese loose fine to me.
Don't compare him to Aaliyah as she does not have a lot of substance, so you wouldn't want to compare a dog with lots of substance to her. IT is apples and oranges.
If you see a waist from above, he should be fine. If you are going to course him, you'll want to be keeping him a bit more on the lean side, as it isn't fair to run him with extra weight on his body.