For me, Starmer would be the only sensible choice.
In some ways, Labour could benefit from Brexit because it's a "done deed" and Labour will have one fewer issues to tear it apart. Nevertheless, the steps along the way need to be scrutinised and, if necessary, challenged to make sure the country does get a Brexit which benefits the majority. I think Starmer is capable of doing that.
Although he has an image of being an Islington lawyer, he's actually a "working class" lad made good.
Whoever is eventually selected, the first priority must be to listen. I'm not advocating a populist agenda of anti-immigration, being draconian on crime etc, but the real issues people have need to be addressed and not dismissed as bigotry and stupidity.
PS. In my opinion, the other contenders would be a disaster for Labour and, therefore, the country.