Ranger

You may be looking for Agent Ranger.

Lord of the Rings
Aragorn and Faramir were Rangers of the North and South, respectively. In general, Rangers are skilled woodsmen and soldiers of the Dunedain.

Babylon 5
An elite fighting force mainly comprised of Minbari and Humans specially trained on Minbar during the Shadow War. Nurse Mirrad is one.

Dungeons and Dragons
A Ranger is a character class in the game Dungeons and Dragons. They draw heavily of the Lord of the Rings idea of a soldier-woodsman but also have connotations of being even more connected to nature (but not as much as druids) than normal people. They often are followed around by animal companions, which are sometimes Cute Animal Friends. Drizzt do'Urden was a ranger.

Final Fantasy
Ranger is a character class in a few Final Fantasy games. Essensially a bowman, they are able to strike at full force from the back row of battle in the games they appear in, whereas most would get a damage penalty in exchange for the defense advantage. In Final Fantasy Tactics, they are ranged fighters and can strike from several squares away.

Power Rangers
Power Rangers are referred to as 'rangers' but are in fact members of a super-sentai group. There are several different colors of power ranger every TV season, and they all have their unique powers and giant robots to pilot. Red is nearly always the leader.