the most overrated artist ever?

ok.. having read opinion polls in the uk that list oasis as one of the greatest bands of all time and their first two albums in the top 5 albums of all time got me thinking... who is the most overrated artist of all time? i find it hard to get past oasis for this dubious honour. don't get me wrong, i thought 'definitely maybe' and '(what's the story) morning glory' were pretty decent albums but as far as i'm concerned there's no way they are amongst the best ever recorded. i've been trying to think of a band more overrated than oasis and i really can't at the moment.

the only artist i can think of as being on a par with oasis is richard ashcroft. he wrote a few average songs and people talk of him like he grew up on mount olympus as the forgotten son of zeus. to misquote monty python.. "he's not the messiah, he's a very overrated boy".

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now i've kicked off proceedings, i'd like to hear feedback about who others consider to be the most overrated artists of all time.