Technically, there was no right wing as we understand it today before the French revolution. The left sat to the left of the king (represented the people) and the right…to the right (represented the nobility and the clergy). The king was supposed to be in the “middle” and arbitrate.
The romans had two factions in the Senate which you could associate with right/left: the optimates and the populares. e.g. Caesar, a dictator, was in the populares (a populist?), so according to your anachronistic view he was a left-wing dictator.
There are more examples of kings that tried to reduce the power of the nobility by appealing to the common people, distribute wealth and build infrastructure.