Yes, we are. You could legitimately claim that each of these guys was the best at their position all time, or in some cases even the best at their sport all time. I really don't see any way to rank these guys one behind the other, but I do see different things when I think of them:
Orr = prodigy
Williams = perfectionist
Russell = lion
Brady = assassin
Bird = wizard
I really like your descriptive words for each player. They really fit.
If I can add on. As far as the types of people they are to the fans away from the game. Let me give it a try:
Orr - Very modest. Humble. Always has enough time for the fans. Supposedly is a perfect gentleman. It's interesting, because the 4 arguably best NHL players of all time, Orr, Gretsky, Howe, and Lemeiux are all super nice to the fans. I have two personalized autographs from him. Love the guy.
Williams - Was ornery in his youth. But, while a bit gruff, seemed to mellow some as he got older.
Russell - Not the nicest guy in the world. Would not sign autographs. Only started signing at all, for money, over the last couple of years. Met him at Maui Airport. Not very nice.
Brady - He's not a bad guy, but a bit aloof from the fans. He's Tommy Hollywood, dating the models and actresses. His teammates love him. Went to the Lions - Pats game in Detroit a few years ago, and after the game he was going through the tunnel, and tons of Pats fans were chearing him. He would not even acknowlege anybody, like most other players did.
Bird - Not Mr. Friendly, but I went to the Celtics Rookie camp in Marshfield, MA when he was a rookie. I must have a half dozen autographs from him. He's always signs, and while not all smiles, seemed decent enough. It's just that his personality is what it is.
I know none of this has to do with the question itself, but felt not touching on this part of them. Others may have some good antecdotes.