I want to put
Tommy Oliver in the running for a top contender
To reiterate my earlier reasoning I posted some time back:
"Aight. For
Tommy Oliver
Before even becoming a Power Ranger, Tommy was a highly skilled martial artists. In his first actual fight, he matched
Jason Lee Scott, who was already considered the best martial artist in Angel Grove and already went through tons of martial arts training even before meeting Zordon, after which he went through even more specialized training. Tommy was chosen as the best candidate for Green Ranger (besides the other Zack, and she chose him as a possible candidate more as a weapon against Zordon). Without any sort of powers, he single handedly defeated a squad of Putties, which the unmorphed Ranger team at this point still struggled to do together with multiple battles under his belt.
After actually gaining Ranger powers, he mops the floor with the Rangers and even breaks into the
Dino Megazord to completely defeat them. Even when he loses, its more because the spell making him evil is broken and the Rangers having gotten better overtime after repeated encounters. Just during his Green Ranger run, he's considered the best out of all of them even when his powers are 90% fried and regularly beats Goldar, the best melee combatant in skill out of all the monsters, who comes from a warrior race and has fought alongside Rita and Zedd for at least a thousand years.
Those sort of shenanigans continue on into his White Ranger run and his ninja ranger run, and his skill and training increase in the latter. Not too much important stuff, other than general ninja training stuff. The same sort of shenanigans also happen in Zeo, and he spends that season in a lot of battles against the Machine Empire, who are superior to Rita and Zedd. He does the same for half a season in turbo.
In the Dino Thunder run, even before receiving the Black Ranger Powers, held back Mesogogs small army of Tyrannadrones (angry AI robots upgraded with dinosaur DNA) and escaped all his forces single handedly. He's also the only ranger able to match
Trent Fernandez-Mercer at first, and they tie in their encounter despite Trent having a sizable AP and speed advantage. He fights a lot more monsters, but you probably could tell that by now. Though, at this point in the timeline, he's already equal to
Anubis Cruger, who is not only pretty much the number 1 SPD (a massive galaxy wide peace keeping force) capable of skill-stomping experienced ranger teams singlehandedly and obliterating a hundred powerful bots, but was capable of matching Grumm, a experienced space warlord and his greatest subordinates in combat and was pretty much the only person to survive the war, which killed everyone else on the planet, before joining SPD.
Even after his Dino Thunder days, he still continued to fight off quite a few monsters using the Master Morpher. In Soul of the Dragon, despite being older, retired, having broken down powers, and a massive back injury, he's still a match for his son, a SPD Ranger in his own right, in combat.
At his peak in Super Ninja Steel, he is considered the only real chance the Ranger's have of overpowering Lord Drayvon's army and the only one capable of escaping him, and helps defeat a entire army of duplicate rangers and singlehandedly defeats Lord Drayvon. Because of his experience and skill, he is considered
the greatest Power Ranger, and for all the silliness that comes with that role, the Power Rangers are still a multiversal organization of the greatest warriors across millions of years, and filled to the brim with master martial artists, ninja grandmasters, Master Samurai, ancient warriors and magicians capable of holding back entire armies singlehanded, and highly trained military operatives. Within his lifetime, the guy is already considered so legendary among Power Rangers that studying his life and feats is mandatory reading for all SPD rangers.
So yeah."