@Finn dAbuzz,
Well, in terms of historical figures there are quite a few of which the following are only some
Hebert Hoover
Robert Taft
Barry Goldwater
Ronald Reagan
Leo Strauss
Friedrich Hayek
Milton Friedman
William Buckley
I have to admit that I'm having a hard time identifying current figures.
The National Review and Weekly Standard as well a number of Online blogs like Ace of Spades, and Hot Air are very influential but none of the writers stand out as a leader to me. I like Rich Lowry quite a lot, but he's no Bill Buckley (nor does he try to be)
In the same vein, collectively the Heritage Foundation and AEI should be considered leading organizations.
On the political front I'm an admirer of Ben Sasse but he hasn't made any effort, it seems, to become a leading figure. I'm still hoping that at some point Mitch Daniels makes a run for the White House, but that seems very unlikely.
One thing for sure is that Trump is not a leader of the conservative movement, and I don't think he will destroy it either.