I note that policy positions are missing completely from your table. Allow me to add some.

“My way or the highway” is exactly where a president should start negotiations. Obama negotiated like Warren does by compromising up front. The result is a health care plan designed by the right wing Heritage Foundation. M4A is the compromise. A UK style goverment healthcare system would be the leftmost proposal. You know who used to say that? Pete Buttigieg, last year.