George M. was a genuine one-off, never better than in his early days with the Mick Mulligan band. "Larger than life" as wee eddie says.
Are there any truly memorable people left in the music business? We still have Humph of course, but who among the current crop is likely to be considered a national treasure (or even remembered at all) in forty or fifty years' time?
George Chisholm was another great entertainer as well as a fine musician; Nigel Kennedy (where is he these days?) is also noted as being a little over the top, but encourages younger people especially to enjoy a wider range of music.