Belgarion, or Garion, is the principle protagonist of the Belgariad and Malloreon. While initially slow to learn his powers of sorcery, and never attaining a level of mastery anywhere near the ancients like Belgarath, Polgara, Ctuchik, and Zedar, he shows enough aptitude late in the story that – when holding the sword of the Rivan King – he is almost certainly the most dangerous mortal on the planet. Note that his power level here reflects the fact that he regularly wields and is fully capable of commanding, the Orb of Aldur. Without it, he would certainly be far weaker than Belgarath or Polgara. He is also decent swordsman, and eventually also learns to joust.
Rand al’Thor is the main protagonist of the Wheel of Time. Channeling the One Power at a level matched only by a few characters in that universe, he has repeatedly shown that he can break the bounds of what is considered possible.