Maybee I think you’ll remember I said
charmless and unconvincing
I didn’t mention charisma.
I think Tony Blair had charm, charisma, and was very convincing. He convinced many of us to vote for him. Margaret Thatcher, love her or hate her, was convincing (I didn’t vote for her, but I can understand why many did.) Theresa May had a certain kind of soundness about her, of course, I think she was a vicar’s daughter. Cameron was certainly charming, but not very convincing. Harold Wilson felt trustworthy, but James Callaghan felt (to me) not very capable. I’ve deliberately avoided mentioning the obvious person as it skews the analysis.
As for Sunak and Starmer, I feel neither has much personality, and neither instills me with confidence. But nor do any of the others!