Dana Milbank has compiled the "decidedly B-list group of Trump supporters who argue his case on the airwaves" — decidedly and necessarily B-list, since "credentialed conservatives and elected Republicans generally won’t defend him."
Milbank's is a serviceable list, including but not limited to Jeffrey Lord, "Pastor" Mark Burns, Rudy Giuliani, Corey Lewandowski (who, too CNN's vast discredit, is both a paid Trump adviser and paid CNN commentator), Scottie Nell Hughes, Katrina Pierson, Kayleigh McEnany (who once said waterboarding is only a "bit of discomfort"; yes, see Christopher Hitchens's 2008 essay on bubbly bits and "discomfort"), and Boris Epshteyn (pictured right).
There is no ranking or hierarchy of surrogate repulsiveness in Milbank's list, perhaps because "elevating" one of these clowns over another is as aesthetically difficult as deciding the superior merits of Milton's Beelzebub and Moloch. Nonetheless, I nominate the last named, Boris Epshteyn, as the most abysmal surrogate of all.
This demonic, lawyerly little man sharpened his venomous incisors as a "communications aide" to vice-presidential nominee Sarah Palin, which means he learned long ago how to never, never answer a question about whoever his benighted boss might currently be. He also sounds as though he has yet to either swallow or expectorate the last bite of his morning's grits.
You are welcome to nominate your own "most abysmal of all," of course. And you really can't go wrong. They're all "winners."