Tough decision...
Chris Redfield, what we know off, had to fend for himself and Claire from a young age. He has millitary training, is able to fly a jet and by his mid twenties is a prominent member within a SWAT-like Police force. Afterwards...
- Survived the initial mansion incident. Had to fight zombies, dogs, snakes, spiders, sharks, crimson heads, Hunters, one giant snake, a giant plant monster, one creepy mutated girl, a mutant shark and the original Tyrant model. Had help from Rebecca with the plant. For a dimissed army man, impressive.
- Afterwards escapes to Europe to Investigate Umbrella and ends up at Rockfort and the Antarctic to fight off zombies, hunters, Bandersnatches, a brief Wesker encounter and oh right, a human turned bioweapon changing forms. Has some help from Claire.
- Has a side mission with Jill fighting off an Umbrella facillity in Russia.
- Partners up with Jessica for a few missions in early 2005 and afterwards a giant creepy ship. Fights off a new enemy type in regards to the Ooze. During this time his personality shifts and is laserfocused on "the mission".
- Later that year infiltrates a new Mansion with Jill to face Spencer and Wesker. With Jill dying, he becomes obsessed with Wesker, completing the mission and roids up.
- 2009, Resident Evil 5; fights off multiple new enemy types infected by Ouroboros; the Majini, bat like creatures, spider-like creatures, gators and multiple bioweapons including Ouroboros creatures. Finishes Wesker off while punching boulders.
- Resident Evil 6, apparantly one of his missions went south and turned into a drunk mess. Flies to eastern Europe and China. In regards to the latter he finally sees some action in a ground zero scenario within in an urban territory. Fights zombies, las plagas types and more.
- Resident Evil 7; he's hunting a psychopath and fighting, yet again, a new enemy, this time the Molded. Seems more collected this time around.
Leon: his early life remains a mystery, but we know he graduated the police Academy at 21 years old.
- With only the academy done and no relevant experience Leon fought of zombies, dogs, lickers, G-mutates and plant zombies. Added bonus: he fought a stalker type enemy build like a brick shithouse and faces him in his super saiyan form. Also, four different types of Birkin's G-Form. Afterwards he escaped a city infested with the virus. That ain't bad for a rookie. Had help from Ada at a few times.
Gets recruited by the government.
- Has a side mission with Jack Krauser in South America for the government.
- In 2004 he goes to Spain, on a mission to find the presidents daughter. Gets confronted by a new enemy type called Ganado's. Next you fight a lake monster, cave trolls, parasitic ganado's, a village leader who actually has a spine, something that looks like the alien, giant kicking bug monsters, Gatling gun wielding ganado's, the regenerator/Iron Maiden, a mutated ex-partner, something that only gets reffered to as "it" and oh yeah, the cult leader that turns into a monster.
During all of this he also gets infected by Las Plagas, withstands brain washing to a degree and eventually removes the parasite. Sure Ada helps out a few moments, but overall Leon gets by on his own.
- In Resident Evil 6, being an advisor to the president (more of a, frenemy?) he again needs to escape a city; traveling from university, to the underground and in the city itself and the underground. Fights quicker zombies and transforming BOW's while in a mine cart.
Afterwards he flies to China and enters another facing another outbreak scenario; fights different enemies, but also some insane guy who transforms into a t-rex, fights the guy on a train and on the Verge of falling down he fights his fly form.
Gets help from Helena and Ada though.
Tough call. Both are extremely adaptable, but I'm going with Leon on this one. Dude has done the most with less. Escaped three cities facing a BOW outbreak. Chris comes close though.