I think his biggest achievement was his ability to inspire lots of teenagers to take up music, many of whom went on to hear the roots of skiffle.
As a singer he had a lot of energy, but i can barely stand listening to his voice, that high whining and then those silly jokes, but,,, bonzo before goes bonkers.
That is my privilege I would rather listen to Pete Bellamy[ and he is not my favourite singer by a long chalk], but that is just taste to which we are all entitled, if we all liked the same music it would be boring.