UnitedHealth CEO shot

I assume you mean Stalin and not Jesus
KIDDING
But using Rumsfeld’s Known Knowns quadrant

A: Kill 5 CEOs and hopefully democracy is restored
B: Kill 5 CEOs and something just as bad takes over
C: Don’t kill CEOs and hope for democracy in 100 years
D: Don’t kill CEOs and get worse and worse oligarchy leading almost certainly to a way bloodier revolution

Since the US already has the democratic structure in place (vs the other worse case scenarios you offered)
A seems the most logical
I think Options A and B are probably the most logical, except I would imprison or ban the damned CEO's from ever doing business in medical industry again instead of kill. I realize you and others might disapprove, but we're not some medieval Islamic theocratic regime like Iran or Afghanistan, I'd like to think we're a little more civilized then them.

Option A seems more like an ideal way to solve it, while Option B seems more realistic as a solution although I would argue Options C or D are also realistic because while guys like Brian Thompson might get convicted or worse, you might be able to convict some of the lower-hanging mid-tier executives, the more obscure, powerful types are harder to put handcuffs on. You have to have a relentless, bulldog SOB prosecutor or AG who isn't afraid to step on toes like Robert Mueller to get convictions on these high-level criminals and sometimes, even they can be out-lasted or out-flanked.

I don't say that because I want to but lets face it, Guido, we have way too many hotheads in our society right now