In my mind, "greatness" means not rocking the boat, even if it is your boat to rock.
Washington set the tone. Lincoln, Roosevelt, Truman, Kennedy, Johnson and every POTUS during and after were reactionaries.
Coolidge wouldn't react if you hit him with a Taser.
That's pretty close to perfect in my book.
I rather suspect Cal would have reacted if a formidable insurrection had been launched.