As has been mentioned, there are a few impressive groups of medals around these days, notably in the rotary world, and of course in the Royal Marines and special forces.
However I think even the most decorated of those guys have got a way to go before they catch up with this bloke. He was notoriously parsimonious, so I imagine he moaned every time he got a new medal and had to get them all remounted! This lot are charging £45 for just the ribbons!
The Ribbon Shop - Medal Ribbons Set - King George VI
(The link title is confusing, it's not the king!)