I think you would get more interesting answers from historians if you don't include presidents from the last like 50 years, partially to remove recency bias and partially because they're historians not political scientists or whatever. You're basically just begging them to default to the most recent bad dude. I think it's easier to make an argument that is grounded in history once a decent amount of time has passed from their regime and we can see the knock-on effects of their policies and choices.
I think you would get more interesting answers from historians if you don't include presidents from the last like 50 years, partially to remove recency bias and partially because they're historians not political scientists or whatever. You're basically just begging them to default to the most recent bad dude. I think it's easier to make an argument that is grounded in history once a decent amount of time has passed from their regime and we can see the knock-on effects of their policies and choices.