Here's a list of our favourite restaurants (not pub restaurants, although I realise two are pubs as well), in only a vague order of perhaps how often we go to them (as you can't really compare some of them)
Paradise by Way of Kensal Green
We keep meaning to go to but for various reasons haven't Ida, on Fifth Avenue, but haven't got around to doing it.
I should also mention my favourite burgers of Kensal Rise. This is...
The Regent, where the burger is large, meaty, not too complex. It was much better than The Diner. I'm not sure about The Chamberlayne's burger, and we find the meat a little expensive (big fans of the pub, though), but their prawn cocktail is about the best thing going.