There’s an Advil commercial with Jon Bon Jovi during which he refers to himself as “singer-songwriter, philanthropist, father.”
I don’t know anything about his charitable efforts, but I have no trouble imagining that they would be substantial, and that seems to be confirmed by this web site. Still, to me it sounds sort of pompous for anyone to refer to themselves as a “philanthropist.” Even if it’s accurate, it sounds like boasting.
Of course, I’m trying to think of an alternate word or phrase that would convey the same intent but without boasting. “Activist” sounds too political. “Donor” would be a literal match, but “donor and volunteer” might work better.