I think the top picture, middle dog, best resembles a modern-day Pit Bull. I'd like to cross solid, working strain Scott American Bulldog (closest one can get to the English WORKING Bulldog) to a terrier (not sure which; perhaps Patterdale) to see if I can "recreate" a Bull-Terrier of the type many claim the Pit Bulldog is. Even if the breeding "fails" to deliver the offspring should be remarkable animals.