Lenin as a dictator is still a bit messy as being clear cut dictator. . As in 1917 it could be argued his word was quite law yet and needed the collective to agree with him. His power did get stronger with the passage of time

Now my moneys on sidonio pais as the first true European dictator.

Who was in office in December 1917

A lot of people don't remember him as he was killed only a year later in December 1918