Greatest Grand Princes of Russia

Decisively ended Mongol dominance of Russia in 1480 and tripled the territory of Russia through wars with the various Mongol Hordes and Eastern European states.

No he sucks ass

Significantly Christianised 'Rus, and improved relations with the Byzantine Empire significantly, to the extent they were Russia's closest ally of Byzantium over the 11th century.

Notably made the foundation for the Chronicles, many churches and cathedrals, defeated his brother, established the Russkaya Pravda law code and Kievan Rus was at its height under Iaroslav's Rulership.

His brutal military campaigns against Bulgaria and the Byzantine Empire resulted in the great expansion of Kievan Rus.

Russians did not ask Rurik to rule them because they are stupid. No, they wanted to expand Russia by merging with Scandinavia.