i would absolutely trade for Dwight Howard. I think he's what this team needs and the C's are what he needs right now.
I don't know the guy but I feel like Dwight is a people-pleaser and he imbibes whatever culture he joins in. He was coddled too much in Orlando which made him childish; Kobe was being Kobe and he entered a toxic situation in LA; Harden unquestionably leads the league in laziness and that has affected everyone's play on that Rockets team.
Given all that, I guess that paints him as a pretty poor leader, which he probably is. But that's fine given that CBS and Smart have leadership in spades. I really think that if he comes in the C's, he's not going to poison the culture. As a matter of fact, I think he's going to embrace it.
FWIW, it's Harden that I wouldn't trade for. Not only would the price be too high, the only thing he can really do is score (often quite inefficiently). I think that it'll be him who will divide the locker room and 'poison the culture'. Honestly, I'd rather have IT4 who at least tries on defense than Harden who doesn't even try.