I will give some examples of US presidents who actually did some things. This will take me into some very contentious history: My goal isn't to take sides in the history but just to illustrate that some presidents actually try to do things. For some of the items in history, you may believe that the presidents did well or poorly; that difference does not concern me here but only that they did do somethings along with, secondarily, to observe that we can differ on the quality of the results. If we do differ on the quality of the results, then we have to accept that presidents who do things can risk failure; one way to avoid both failure and success is not to do anything.
As far as I can tell, no one knows what was in the minds of W and Cheney at the start of Gulf War II -- not even still in the minds of W and Cheney.
But Gulf War II was a big effort and not just some "placating sound bites", platitudes, cliches, fantasy nonsense. I thought that the effort was foolish, but it wasn't small.
So, for Gulf War II, were W and Cheney just pushing out "placating sound bites"? No, I don't think so. Basically I wish all they had done was push out "placating sound bites". Instead, I have to believe that they believed that what they were doing was prudent, maybe even necessary, to "protect and defend" the US. And they had a point: At the time of Gulf War II, doing nothing seemed to risk a significant WMD attack on the US; I didn't really believe there was much risk, but, right, it was a small chance of a big loss and, thus, difficult to evaluate.
Of course, as we know now, what they did in Gulf War II cost the US a lot in blood and treasure. I'm sure there were some brilliant military operations, some grand heroism, and some astounding successes; there were also some major screw ups.
Maybe long term, history will record that the US dumping Saddam in Gulf War II and putting in place a democracy, fragile, a long way from perfect, was a grand turning point in the Mideast, US and world security, taming of radical Islam, and progress for world peace. Hopefully. And I can believe that such was some of what W and Cheney had in mind. I doubt we achieved such success, but maybe.
So, Gulf War II was an example of political leaders actually doing something, that they believed in, that was risky, and that they could get blamed for. I'd say they were high on courage, sense of responsibility, and patriotism but too low on simple, basic, pragmatic smarts.
Else? For Saddam, I'd have put in place one heck of an intelligence operation so I knew what the heck he was/was not doing. I'd turn as an intelligence asset everyone of importance in the place short of his cook and maybe also his cook. Then I'd "Make him a offer he couldn't refuse: 'Behave or you and your family, children, and grandchildren will all perish.'"
Or, for a small example, in Iraq US General "Mad Dog" Mattis told some Sheiks: "I come in peace. I didn't bring artillery. But I plead with you, with tears in my eyes, if you f&&k with me, I'll kill all of you.".
I know; I know; international relations are not supposed to do that. So, adjust the message a little. But, net, I'd have left the thug in power and saved US blood and treasure. If the Iraqi people didn't like their thug, then that was their problem; the role of US policy was mostly just to make sure he was not our problem.
Ike? He pushed the interstate highway system.
Reagan? The Soviets were terrified of Star Wars (I doubt that they should have been), and Reagan used it, along with Poland, etc., to help break up the USSR.
LBJ? He was just determined, beyond belief, to 'fight for freedom' in Viet Nam. He allocated huge US blood and treasure. My view is that the US is fully happy with Viet Nam now (my Brother laser printer was made in Viet Nam and is better than my old HP laser printer), and my view is that the US could have had essentially the same result in 1947, 1956, ..., by doing essentially nothing. Yes, Ho Chi Minh liked to appear on parade reviewing stands in Moscow and Peking -- nothing's perfect -- but actually that meant next to nothing.
Net, lots of US presidents actually try to do big things; mostly I don't like the results; but they don't all just mouth platitudes.