Tim Vine - very quick and holds a record for the most one liners told in one minute I believe.
Then I'd be torn between David Mitchell and Lee Mack, though I think they're perhaps best at more panel shows tbh.
A stand up's as good as you like their personality, the clothes that they're wearing and their last act.
So great, professional, well dressed, wordsmiths for everybody like Bob Monkhouse and Les Dawson go out of fashion with people when putting on a tight T Shirt and appealing to only one type of audience becomes the vogue.
I do not trust anybody to know what is worth preserving in our culture. The idea that it is often in the hands of some 'hipster' magazine writer putting it down to being their 'guilty pleasure' rather than acknowledging that it was always timelessly good, is appalling.