Morecambe and Wise - hhhmmm, an interesting case (but not necessarily very funny). I thought that Eric could be quite amusing (in an eccentric 'favourite uncle' sort of way)- but Ernie wasn't amusing at all. Ernie always reminded me of a rather dull little man desperately trying to be funny - and failing.
I have a dim memory of them getting a new writer about 30 years ago (Eddie Braben ... or something?). He wasn't the genius he was made out to be at the time and, for me, M & W went (even further) downhill from then on. Mind you, they got a lot more popular, so what do I know?