The great Russian Bronzecaster/Artist Evgeny Lancere. He had a very talented pupil in Paris in the late 19th early 20th century, an American of some aptitude who returned to the US and made a small name for himself, Frederick Remington.
The Imperial Porcelain Factory was turning out pieces equal to anything else in Europe. The Imperial Lapidary Factory in the Urals produced pieces far surpassing anything made in Europe at the time, works in semi precious and precious stone we can not even begin to match today in quality or skill of craftsmanship.
Benois, Kustodiev, Samokisch, Aisavosky, Repin, Bakst, both Vasnetsov brothers, Marc Chagall, and the entire Mir Iskustva movement in art. Plus many others.
Serge Prokhudin-Gorskii, who made full color photographs some thirty years before Kodak was able to do so, when nobody else in the world could.
Nikolai Tesla, who did more to advance the electrification of modern society than Edison could have dreamed of.
Prince Lev Galitzine, who was Europe's foremost expert on Wine and oenology. Prince Galitzine not only accumulated the largest and most important collection of wine in the world, but also taught Europe about advanced wine growing and making techniques, and taught wine appreciation to all of Europe, some 100 years before the rest of the world caught on.
More to come, this is just off the top of my head.