"A warrior is a person habitually engaged in warfare." Here is my top 3...
I can agree with 300 (as the Spartans were prodominantly soliders in that representation), as for Aragorn...he was reluctantly the warrior, only raising the blade to protect himself and his allies. As for old Mel...not a bad choice...but just doesnt feel right.
From your quote, you are looking at warriors that fight out of Habbit...not those pushed to the point where warfare is the ONLY option;
My three in this catagory are (sadly no images);
1) Conan - Either from book or film incarnation. A man bred for the fight (in the stories) or A man trained how to fight for survival...and the sheer love of blood (the film)
2) The Uruk-Hai - From either Book or Films. Bred for blood, its that simple.
3) Darth Maul - Star Wars Episode 1 - Raised and trained for the sole reason of battle. Who needs depth when you look like a demon and have a double bladed lightsaber? :maul
One thing you'll notice...none of my selection are "heroes"...even Conan at best is considered an Anti-Hero...he does what he does not for some greater good, but to survive and fill his own pocket.
Its hard to find a true "Habitual Warrior" that is a Hero, there are a couple...but most are reluctant warriors only fighting to protect themselves and they're friends/families. Wallace and Aragorn are prime examples...Reluctant Warriors, where as King Leo there...is a mix of born and raised warrior vs the reluctant warrior - fighting to protect his "world" from the persians.
Anyways, thats just my opinion,
if you dont like it...talk to the wookiee :chew