Leadership Aragorn is a very versatile character, allowing you to ready him for 1 resource each round. Throughout the game this is going to get expensive so you are better to find some other way of readying him at some point but in the early game it is extremely powerful to be able to quest with him and ready for combat. With his 3 , you really want to be attacking with Aragorn but his high hit points and sentinel ability, mean that he makes a decent emergency defender when needed.
I think the key to using this early version of Aragorn is to design the deck around him. I don't usually like wasted stats and tend to pick heroes that have a dedicated role but once Aragorn has his toys, he is pretty formidable and can do all things well. Celebrían's Stone enables him to quest for 4 and gives him a icon to be able to pay for some very useful and powerful cards, such as Unexpected Courage for extra readying, A Test of Will and Hasty Stroke. For this reason, he's a great candidate for Steward of Gondor and any other resource generating cards you might use. He's in sphere with Sword that was Broken to provide a significant boost to and even gives the humble Snowbourn Scout new purpose. Also in sphere are Steed of the North and Roheryn together allow Aragorn to engage an enemy and immediately attack it. The latter also gives him a icon so he can gain access to even more combat boosting cards, though he has in-sphere access to Dúnedain Mark and in-traitaccess to Gondorian Fire. Alternatively, you can make use of him as a capable defender with the group by slapping an Armored Destrier on him and boosting his with Dúnedain Warning, [Blood of Númenor] (/card/05013)
The introduction of Thorongil makes for some interesting strategies as you could start off with core Aragorn for his readying ability and then bring in one of his other versions depending on the scenario. Aragorn is a great choice in most situations.
With his innate readying ability, he is also a great choice for a two-hero deck as you'll be able to have a hero ready for combat even if Strider takes its time coming out of your deck and with his 5 you can potentially afford to take an undefended attack or two and then heal him up with the in-sphere Dúnedain Remedy or the in-trait Athelas. Arwen Undómiel's ability and the synergy between dunedain and noldor makes her a great partner but the same could be said for Sam Gamgee or Glorfindel or either version of eowyn.
His attachments granting him additional spheres make him excellent in an Elfhelm deck too.
All in all, this early version of Aragorn still stands the test of time and if anything has improved as the card pool has expanded.