Streathamite
ideological dogmatist
It is an irrelevant and obsolete myth that Labour can only win elections as a liberal centrist party. It's at least 7 years past its sell-by date, i.e. when the electorate started emphatically rejecting everything centristI'd go for Starmer.
For a start he'd take Labour back to the centre ground which is where they need to be to win elections.