If you know me even in the slightest, you already know who #1 is...but check out the rest of the [Top5] here!

Elvis Costello (technically born in London, but of Irish heritage according to Wiki, so I'm claiming him)

 

Thin Lizzy

 

Van Morrison

 

Them

(yes, I know this was Van Morrison's first band, but I felt like it was different enough from his solo work to warrant two positions)

 

U2