CHINA, EGYPT, ROME
Were they truly great?
Apart from being big empires, no. China came close, but they were the least pagan of the countries you listed.
All of those countries used forced labour, all of them were dictatorial, all of the oppressed women. Rome killed people for entertainment, Egypt tried to massacre the entire Jewish population, China - well I guess was the best of them - and also the least pagan.
Did they have hospitals? Human rights? Science (not referring to technology)? Capitalism (not slavery)? Democracy? Universities?
NO! No country has ever become truly great without being Christian.
I am not calling Europe perfect, Europe was worse than Egypt and China before Jesus was born.