Mangog has magic, I'm sure timedump would be refuted. This goes for Thor as well, classic Thor had time abilities for a loooong time. Waverider also gave me the impression that time-powers would not help that much against Doomsday.
Assuming he can time-BFR all of these, he'd stop at 10
Gender: Male Location: Drinking gasoline. Pissing napalm.
Time manipulation isn't the only thing Zemo has. Spacial BFR works, too. Interdimensional BFR. Increasing a being's gravity exponentially. Electromagnetic f*ckage. Flat out overpowering them with energy blasts. Energy drain (which would work on Mangog IMO), etc.
Thor can apparently resist gravity increased to infinity.
Dimensional BFR? Get real.
He's not draining energy from Mangog either, it's not as easy as it sounds. Loki needed to do it over an extended period of time in Ragnarok, and the thing is powered by hate.
He was able to do it to Grandmaster who had power to pretty much freeze everyone one on earth. He is also able to bring the dead back to life etc A very well established time Manipulator.
Even he could not get out when he was BFR by moonstones. Zemo can dump pieces of his opponents to different dimensions / time streams. That would pretty much kill any herald level hero if they can't manipulate their own bodies.
Interesting note here is that Zemo can see all possible outcomes if chooses because he can see all possible futures reality with moonstones. In this gauntlet this is would extremely handy as soon as the fight starts he would know every possible outcome of the match and "fix" what needs to be done to win.
Here he BFR Grandmaster who time manipulation powers knows no bound here is an example of what type of power he holds over Space/Time/Life/Death.