That's it mate, Barker had everything. Great acting skill and perfect comic timing. Only other comedy great with timing anywhere near his level was Eric Morecombe imo. Different type of comedy but the same skill. David Jason is another one mind.. David Jason played Blanco Webb in "Porridge", of course, just on for the many memorable minor characters, all superbly portrayed.
Lukewarm, 'Orrible Ives, Bunny Warren and McLaren....and who wouldn't be terrified of Genial Harry Grout ?
(What was the name of Brian Glover's character ? The really thick fella...."I read a book once.....green, it w