Stargate SG-1's most memorable and arguably most liked character was Teal'c, a Royal Guard of sort for the evil faction, a part of an order who incubates a young parasite in their stomach, which makes them stronger then an ordinary human, and helps the parasite grow, until it is old enough to take a host of it's own. Teal'c fought against his own kind and was marked a Jafar, a traitor, but fights to free not only his own kind, but all humanity from Gould oppression.
Is incredibly skilled with a staff weapon, has little use for words mostly, and does with his eyebrow what Caruso does with glasses.
Ronon fought against the Wraith in a losing war, watching his entire home destroyed, and when he was captured, he was not fed upon, but implanted with a tracking device and released as sport for the Wraith. For years he ran from planet to planet, constantly hunted, killing every Wraith that came for him. He was infamous as a Runner, to the point of Urban Legend.
Captured the Atlantis team, but eventually sided with them. Took the implant removal without sedatives, despite the fact it was very close to his spine. Prefers to fight with two sticks, but is an incredible melee fighter.
The similarities between these two are impossible to ignore. Some would call Ronon a Teal'c knock-off, but personally, I love Ronon.