Idk, from a purely political standpoint, I’m not sure there is a better candidate on that list than Beto(I reserve the right to change this opinion).
Has that Obama/Trump Rorschach quality to him, appeals well to the base, makes moderates feel safe, has some of the best charisma of the bunch, recognizes the importance of mobilizing urban areas but loves to put effort into connecting with non-urban voters, seems to be inspiring people to want to come and work their ass off for him.
That has typically all been a successful recipe in the past for Democrats.