Steve Irwin I don't think what he did was a particularly big deal with the kid.
I don't really like celebrities as role models though. They have to have public personas as a matter of course. I would instead try to point to specific behaviors from real people. I also don't think people have to be perfect. But I do think there are some deal breakers that would mean I would never point my kids towards them as a role model. Racism and homophobia are among those things. I think believing that whole classifications of people are lesser is disqualifying.
Just like the parent comment was trying to do with Chuck Norris. (Which was probably way worse than any of these examples)