Lincoln: Marfan's, and terrible pain. Depression.
FDR: Polio, and partial paralysis
Kennedy*: Addison's and terrible pain
* not a great President! But remembered incredibly fondly by a lot of boomers.
wondered who the healthiest president would've been, and accidentally gave my brain a splinter with the intrusive thought "if he was around today Teddy would be a CrossFit Sicko"