I would encourage yall to watch this video lmfao.
Scaling lions based sheerly off of their size is dumb. Lions have a much greater percentage of fast-twitch muscle fibers in their bodies than both grizzlies and tigers, meaning lions are capable of much more explosive movements than both. Pound for pound lions take far better advantage of their size than tigers and especially bears.
Tigers are stealth hunters, they kill in the wild by utilizing stealth rushdown tactics, and they almost exclusively prey on animals that are smaller than them.
Grizzlies are more akin to scavenger tanks, they don’t typically fight other animals in the wild aside from occasionally other bears. Grizzlies are massive, semi invulnerable tanks that have extreme power, but by nature they are not combat animals and more akin to just huge scavenging tanks.
Lions are pure warriors, they prey on massive animals that are much larger and stronger than them like African Buffalo. They aren’t stealth/rushdown hunters like tigers, praying on smaller animals via stealth. They aren’t big scrubbish but powerful tanks like grizzlies who only actually fight someone equal to them in stature every so often. Lions are warriors who kill bigger and stronger animals than them constantly, they live for battle and they are 100% combat predators. Putting a lion in a fight with a tiger is like putting a gladiator in a fight with a stealth assassin, putting a lion against a grizzly is like putting a gladiator in a fight with a sumo wrestler (grizzlies beat lions to be clear).
So yeah you really can’t scale lions exclusively off of their size as they are pretty much the only land based predator who are pure warriors praying almost exclusively on bigger and stronger animals than them.
Respect lions man. Truly an A tier animal with easy arguments for S tier.