A quick look at the small list of comedians I've seen at the festival this year, if you're looking for a recommendation...
Brilliant/ loads of laughs / highly recommend:
Judith Lucy
Rhys Nicholson
Great / worth a look:
Justin Hamilton
Joel Creasey
Good potential / room for improvement / up & comers who will probably be on TV & radio in 5-10 years:
Dilruk Jayasinha
Becky Lucas (This show was only 40 minutes long & had a strangely abrupt ending & sombre tone.)
I found hilarious but suspect it's an acquired taste:
Karl Chandler