Now this is a good question. Coaches can definitely be dawgs, but I think the jury is definitely out on Bucky.
When I think of what makes a dawg coach, I'm thinking of coaches that get buy-in, their teams play hard, they tend to be better than the sum of their individual parts, etc.
Like Pearl and Sampson are definitely dawg coaches. I'd argue Buzz is definitely a dawg coach. Probably too much of a dawg coach to be honest.
Like with players, it's important to remember that "dawg" does not necessarily mean "good." It's a little hard to be a dawg if you aren't at least some level of good, but the reverse is not true, you can be very good with minimal levels of dawg-ness.