In the field of biology, there are generally no official rankings of the "strongest fighting" cats, because the strength and fighting skills of felines are primarily for hunting and survival, not for fighting each other. However, if we consider factors such as size, strength, and hunting skills, here are some felines that are considered relatively strong:

Tiger: As the largest cat species, tigers possess immense strength and exceptional hunting abilities.
Lion: As the "King of the Jungle," the lion demonstrates strong leadership and fighting ability within its group.
Jaguar: As the largest cat species in the Western Hemisphere, the jaguar occupies an important position at the top of the food chain in its habitat.
Snow leopard: Snow leopards are adapted to high-altitude living environments and possess great physical strength and endurance.
Asian Golden Cat: Although not large in size, the Asian Golden Cat is a very powerful predator.
Clouded Leopard: The clouded leopard is known for its exceptional climbing ability and immense strength.
Leopard: Known for its agility and strength, the leopard is a highly efficient hunter.
Cougar: Although called a "lion", cougars actually belong to the cat family and are one of the largest cat species in North America.
Lynx: Known for its long legs and agility, the lynx is an excellent jumper and predator.
Eurasian lynx: Despite its small size, the Eurasian lynx demonstrates a strong ability to survive in its ecological niche.