I'd go with Alain De Botton. I like Sam Harris too but a lot of people hate him. He's not a philosopher per se but he's willing to have strong opinions about controversial issues.
So is Rush Limbaugh. A lot of people are, in fact. Being today's Bertrand Russell should require a bit more than that.
Furthermore, he sometimes changes minds -- including his own -- based on those dialogues. Limbaugh just preaches to the choir.