Queens Head is best for craft within walking distance of KGX. I really like King Charles I for an old school boozer with good cask.
Bloomsbury there's not a great deal in terms of craft. Craft Beer Co down there is good.
Angel itself and Upper Street are dominated by chain stuff but there's plenty good places off the side streets. Down the bottom end the Wenlock Arms and the Earl of Essex are great. The Three Johns is okay as well. Further up you've got the Compton Arms which is also very good, and the Pocket pretty much opposite.
If you keep going up to Highbury Corner there's Hammerton brewery's bar and also The Lamb. I wouldn't really recommend any other pub in that stretch as they're mostly generic and overpriced. I have tried virtually all of them over the years...