So, who do you think is in the pipeline for 2020?

Who do the Democrats have who could be a good nominee. I'm a Trump supporter, but even I know the only reason he won is because the Dems put him against an unlikable, uncharasmatic opponent. I'm also a registered Democrat who would be willing to go back to the Dems if they found a good nominee (I would have voted Bernie, hated Hillary), otherwise it's more Trump for me. So, who do they have?