Being our king, he is what all Gondorians aspire to be........well....except for that little "No Blood for Oil" gaffe.
Here a question for our LOTR scholars, did the Dunedain exist before Gondor, or did they come out of Gondor?
The Dunedain are more of a "term" than a "people". The name is for the Men of Numenor, and their descendants in Gondor and Arnor after the great Downfall in the 2nd age.
Suddenly Bilbo looked up. 'Ah, there you are at last, Dúnadan!' he cried.
`Strider!' said Frodo. `You seem to have a lot of names.'
`Well, Strider is one that I haven't heard before, anyway,' said Bilbo. `What do you call him that for?'
`They call me that in Bree,' said Strider laughing, 'and that is how I was introduced to him.'
`And why do you call him Dúnadan?' asked Frodo.
`The Dúnadan,' said Bilbo. `He is often called that here. But I thought you knew enough Elvish at least to know dún-udan: Man of the West, Númenorean. But this is not the time for lessons!' He turned to Strider.
"Dunedain" was both a generic term for the Men of Westernesse (Numenor) and a specific term for the Rangers of the North after the fall of Arnor. For more info on the founding of Gondor and Arnor, read the Akallabeth in The Silmarillion. It was Tolkien's version of the Atlantis myth. :)