But most of those guys didn't use only body weight stuff. Thomas Inch, Sandow, Saxon, etc are all listed there and they did a lot of stuff like bent pressing, 1 arm deadlifting...lots of lifts that you don't see hardly anymore. Very few of them benched but nearly all of them did a lot of overhead pressing and olympic lifting variations.
And, by the way, Charles Atlas was sued because it was found out he used weights rather than what he was selling to the public and lying that it worked to build the body that he had.
Just google dynamic tension, there's a lot of martial arts related stuff that spout this stuff off as great when it's not really all that effective for building strength. Sure, maybe if you're new to lifting but after you've built some strength, isometric bodyweight contractions aren't really that beneficial. And before anyone says anything...yes, there's a benefit to everything but it's knowing when and how to use it.
If you want to do dynamic tension...press your palms together, now press so hard that you're body is shaking for several seconds...there you go...dynamic tension.