I have not kept up with the current bunch, but I would hazard a guess that we have not yet seen the next true heavyweight.
The next to really rule the roost may well be a young charismatic turk who comes in just at the right time (old guys are about senile, he convinces a compliant majority of younger ones) and I would be willing to guess that it will probably be twenty years before the cards are stacked for it to happen. If it ever happens, of course.
Until then, legal & financial department continues to really run the show.