Not yours, though if you must. Yesterday Steve Coogan was on, and although i've never listened to the show I thought that might be a punt, however much of a tool the bloke is. Choices were fairly predictable.
These are some of the more decent choices from past contributors:
John Malkovich ; Dr.Dre,
Jane Horrocks ; Joy Division
Sinead Cusack ; Portishead
Joanna Lumley ; The White Stripes
Paul McKenna ; Leftfield
Yoko Ono ; Amiina
Sam Taylor - Wood ; Nick Cave and the Bad Seeds
Nigella Lawson ; New Order
Jo Brand ; Talking Heads

Er, that's it. It's hard enough to find people i've heard of, never mind decent tracks in their choices. Loads of Stones, Dylan and bland mainstream guff. P.s. one of he above choices isn't true. David Walliams had the best list I saw.