These are:
Michael Bennet (CO)
Joe Biden (Various)
Amy Klobuchar (MN)
That’s it!
Bernie Sanders has only won elections statewide in Vermont. Which is the third most liberal state in the country.
Deval Patrick has only won statewide in Massachusetts, which, again, is the most liberal state in the country.
Tulsi Gabbard has never won a statewide election.
Michael Bloomberg has never won a statewide election.