I disagree. Thomas Lang boasts a far more diverse CV than Buddy.I'm not exactly a huge Buddy Rich fan, but I don't think his range of specialization was any more narrow than that of the other three drummers you name. Those guys have very specific things they specialize in and they are amazing at them. But they'd be the first to tell you they're not world class big band drummers.
Maybe not as swingin' as Buddy.
Dennis Chambers is pretty dangerous when he's swingin'
Whether they're as great or not at a particular style I do believe that the new breeds are better at a much more diverse range of stuff. And they're bridging the gap between drum machines and drummers. Doing things people used to think was impossible.
Again, this is just my humble opinion on the matter.