He is a 'virtuous pagan'
Tom Shippey would say. He was a bit rude to
Gimli in the 1st edition, but JRR cut it back (Road to ME p.444). Anyway you should read this:
Road to ME Chapter 6 'When all our fathers worshipped stocks and stones...':
"[Of the Riders but by extension every character] their society has in a word been bowdlerised. They are so virtuous that one can hardly call them pagans at all... Nevertheless his characters are heathens, strictly speaking, and
Tolkien, having pondered so long on the
Beowulf-poet's careful balances was as aware of this fact as he was aware of the opposing images of open Christianity poised at many moments to take over his story. The pagan counterpoint to the eagle's song [announcing victory over Mordor and the fall of Sauron] may be the death of
Aragorn, relegated as it is to an Appendix. Aragorn is a remarkably virtuous character, without even the faults of
Théoden, and he foreknows his death like a saint. Nevertheless he is not Christian and nor is
Arwen...
...He has some hope of the future and of something
outside 'the circles of the world' that may come to heal their sorrow [of death], but he does not know what that is... It is impossible to think of Aragorn as irretrievably damned for his ignorance of Christianity. Still he has not fulfilled the requirements for salvation either."
He then quotes the deathbed statements of Théoden and
Thorin Oakenshield, and suggests his heroes go to a place like they evoke 'till the world is mended'.
Also mentions Letters p. 172 which sounds worth reading for your inquiry. I recommend you the whole chapter which goes in detail about the relationship of the LR to Christianity, the points at which it most clearly comes through, and the ways in which it is distanced from it as the text of
Beowulf is, too.
Is he a good example of a Christian male? Well he isn't one, and he is "characteristically 'superior in degree to other
men'" in the sense that he can run 135 miles in 3 days, lives in full vigour for 210 years to die on his birthday and can summon the dead. Despite that, I would still say the answer to your question is basically yes. He resists sin, behaves like a Christian to all intents and purposes, has a romance inspired by Tolkien's own (a pretty shining example in a Catholic sense since he even converted his wife from the C of E!), and resists despair.
Boromir represents a different aspect.