I went to see Alien Ant Farm last year (I know, you’re jealous. They played the whole of Anthology, plus the other one people know/some people know) at what was essentially my local (Craufurd Arms in Wolverton, actually a really cool little venue). The band were selling their own merch afterwards, so I chatted to the drummer for about an hour before we all fucked off. Nice guys - singer was definitely dosed up on something on stage.
I’d say dame Judi is easily the most famous of this list
but it’s a weird one because ‘most famous’ is a terribly tricky thing to judge due to the whole ECHO CHAMBER thing
also, people in the UK are easily fooled into thinking that UK pop stars are internationally known when in reality no one outside of Britain has a fucking clue or care about 99.9% of them