Based Robespierre

Will he ever be topped?

Hobbes is the GOAT liberal

What did he do that was so significant?

the french revolution and your question would be more appropriate for

Nibba are you serious?

He killed the Enragés and went after his fellow radical Jacobins instead of cracking down on the right wingers.
He is still one of the good liberals.

edgelord who killed a bunch of people to 'protect' the revolution

The more I read and learn about what the actual situation France faced, the more that the Terror is justified. For the most part, Robbie's paranoia was right.

It was justified but the terror was misdirected and it ultimately failed to protect the revolution.

Naw he just didn't go far enough. And also he opened up suspicion that anyone could be punished by the people's virtuous will, which scared the radicals enough to coalition with moderate liberals. He should have purged all of the counter revs before he implemented his divine violence "Walter Benjamin" level of terror. But he thought that virtue was more powerful than wealth and capital, thus like all liberal revolutions it was doomed.