OEMs are not actually the original manufacturer of the equipment, but are actually a company who has a relationship with the original manufacture to resell that manufacturer's product under its own name and branding.
Definition of warthog. : a wild African hog (Phacochoerus aethiopicus) that has large protruding tusks and in the male two pairs of rough warty excrescences on the face and that is sometimes placed in two separate species (P. aethiopicus and P. africanus)
I don't know if you'd consider it a fighter, but the A-10 Warthog is probably the strongest plane in the Air Force. Although there is no definitive to this question, many would argue that the F-15 is the strongest fighter aircraft in the world. There have been instances where this airplane lost an entire wing and still manage to fly and land safely.