Chess players at the highest levels today tend to be more versatile in opening choices because of engines. If you played the same thing over and over you would slaughtered by engine analysis no matter how good you are.
Magnus plays e4 more often than any other choice but the difference is fairly small and combined plays all other openings more often.
Anand plays e4 about 7x more often than d4.
Morozevich plays e4 about 2.5x more often and Topalav is fairly similar.
Throughout history I would say up until about 1920 e4 was more common with virtually every player. From 1920 to about 1950 it was fairly equal with both Capa and Alekhine playing both but slightly favoring e4. After 1950, there was a divergence and you see many strong e4 players (Fischer, Tal) and many more d4 players. In the 80s, Kasparov was the first to see the value of playing a very broad rep and played both. That has carried over to the chess we see today.