Julius Caesar and Augustus Caesar might have been the least twisted (which is saying a lot),
I wouldn't say that about Julius Caesar, TBH. The guy killed, according to some estimates around 2 million celts, including a substantial number of defenseless women and children, to gain access to their gold mines. That's what the Gallian campaign was all about. He also destroyed the Republic, which, even though it wasn't anywere near a paradise, was still damn sight better than what followed. I'd say he's up there with other mass-murdering monsters of history.
You're not fighting some oppressive dictatorship. At worst, it's a giant machine, where the right hand doesn't know what the left is doing sometimes. Politically, i's got more in common with America than Rome.
An empire is still an empire. It exists to leech wealth and resources from the provinces to support and enrich the central province. It's clear though, that Bethesda writers don't intend the Cyrodiilic Empire to be as bad as the Imperial Rome in it's worst days, even though they've always been expansionistic, and dismissive of the populations of the provinces and client states.