They're all politically vapid, aren't they, the new ones? Know which way their bread is buttered if they want to start/keep doing tv. i.e. Don't call the tories cunts, or the establishment, which is now operated exclusively by them, will have you quietly suppressed. Bit like blackballing unionists.
I'm afraid I don't really know any new unknown political columnists. Very rarely hear standup. I get the feeling everything Sayle did had a political bent, at some level. Mark Thomas would be alright to squirt the squits with, for an hour. What we really need is to get CM in there with him, and we all know it.
They like their panel shows, or family friendly sitcoms, the BBC. That's how you get a career in comedy. Notable exception of That Country.