Apologies for the bump, but I'm a little bored at work and I think I've found someone who would make the PERFECT pitch dark black comedy:
Dr. Doctor Willard Bliss (yes, I've typed that right, his first name actually was Doctor)
So this guy was in medicine his entire life, first treating Zachary Taylor for malaria at age 19, before he'd even went to medical school.
He graduates and gets licensed as a medical practitioner in 1849, then starts selling snake oil, something called cundurango which he claimed was a wonderful treatment for "cancer, syphilis, scrofula, ulcer and other blood diseases". This gets him struck off by the Washington DC Medical Society.
He works as a surgeon in DC during the Civil War, and becomes superintendent of Armory Square Hospital. In 1863, he's imprisoned for accepting a $500 bribe and letting a member of public use the hospital's stove.
He also gets expelled from the DC Medical Society again for supporting homeopathy, and being opposed to letting the society admit black members. Because he accepted a new and novel medical innovation in homeopathy and it put his career at risk, he refuses to accept another new medical innovation: antiseptics.
In 1881, he's summoned in a medical emergency to the bedside of President Garfield, who has just been shot. He probes around inside him with his fingers, and concludes (wrongly) that the bullet is in Garfield's liver. He orders Garfield be isolated from the rest of his physicians and staff, although he relies upon the wives' of US Cabinet members as nurses. Bliss keeps digging around inside Garfield's wound with his fingers over the next few weeks, but is still unable to find and remove the bullet. He then calls in Alexander Graham Bell, who has this new handy-dandy invention to help locate it: the metal detector. The detector is confused by the bedsprings and can't locate the bullet. It later transpires the metal detector would have worked fine, but Bliss only allowed Bell to examine Garfield's right side, and if he checked the left, he would have found it.
Garfield dies, and Bliss then submits a bill for $25,000 to the White House for his services. He's offered $6,500 instead, and refuses it, utterly insulted.
Tell me, TELL me, that wouldn't make a brilliant for the Coen Bros or someone similar. There's a genuine comedic masterpiece here in this guy's life.