I like his tough matchmaking and he's in exciting fights but I don't particularly like him personally nor do I rate him highly. I just think he's someone Johnson would beat therefore I think it's fair to say Johnson would at worst be a world ranked HW today.
Byrd was a slapper. You have to have a low level of expectation to be impressed by him. Johnson exhibits skills at a very high level unseen in the hwt ranks for many decades. Certainly completely unseen today. Those skills put him ahead of 90% plus of ALL hwts in boxing history.