there are always more difficult variations to do, far beyond the ones you mentioned. For instance very few people on the planet will ever get to this point:
I personally am not a bodyweight devotee because it is too hard to hit the full range of motion, as van gelder does above, if you are not a world class athlete. I can do a similar movement with cables or dumbells and do it with greater reps and not put myself in the high risk of injury that is inherent in 1 rep max moves whether they are bodyweight or with weight.
You still only get to a certain point---you are using your bodyweight. Now mind you, you develop off the charts
balance...
But take a look at capoeiraistas, they have some of the best body control around, particularly the old guys who do Capoeira Angola. The thing is, your body gets adapted to using your own bodyweight.
BTW, for triceps, try 3 point pushups---have your hands
together like two cars passing one another, very great for warm up or finishing after a tricep workout...
I'm surprise they don't use ankle weights or a weighted belt for resistance. I guess they don't know, or no one bothered to tell them. My legs were unreal when i played ball.
They probably already know, but like the bodyweight workouts the best.
Back in college I used to do pushups and calf raises with weights in a backpack,
then, I started doing decline push ups off of the bed. After I graduated it was declines off the wall---of course the higher your feet go, the harder it is.