Civilization Flexibility ~1100 ELO

I have about 700 ranked 1v1 games played as the Mongols but DE was really my first all-in multiplayer experience with AoE. I am now able to execute any build with the Mongols (drush, M@a, trush, flush, scrush) and I have the timings specific to the Mongols down pretty well. Not all builds are strong for the Mongol civ but there can be certain times where a weaker build will have better results, for example, m@a into a champs build against a civ like Goths so I see the Mongols as flexible because they can win with builds besides their power composition (Mangudai and Hussar). Now I am wondering are all civs this flexible? Is the mongols the most flexible civ? Is there a more flexible civ? And are some civs are more specific but strong on that specific build? I guess I am asking as this is the point where I’m about ready to shed my “main” and start looking into random or tournaments where more than one civ is played usually so I would like some more build flexible civs and avoid build specific civs (talking like fast Imp Turks here). What’s a fun civ that has a great power composition but can do it all too? Persian? Saracen?