Literally nothing in my post could be considered shitposting or bait. I'm just hitting the guy who considers pre-Islamic Iran as some kind of different culture and civilization compared to Islamic Iran with some hard facts. I did it also in this post where I explained the direct Semitic origins of all of our three historical alphabets.
As a non-believer trying to look at Iranian history from an unbiased lens, it's baffling how much unwarranted anti-Islamic sentiment exists among others with the same interest. Iran flourished during the Zoroastrian era and Iran flourished during the Islamic era. It wasn't until the arrival of the Mongols with the genocidal destruction of the Iranian lands and people that Iranians truly fell behind on everything. And it wasn't until the Pahlavi era that the nation took on a new direction of redemption.
As for your question OP, I like the Achaemenids, Sassanids, Safavids and Samanids for different reasons.
Achaemenids: unified the Iranian peoples and established Iran as the first world superpower, spreading the advanced methods of Persian administration across the known world, connecting the major ancient civilizations, their unique ideas and cultures
Sassanids: looking up to the Achaemenids, the Sassanids expanded the Empire again, this time with an Orthodox Zoroastrian zeal, inheriting the Perso-Roman wars which would last for centuries, BTFO the Roman Emperor
Samanids: first independent Iranian empire post-Islamization, Ferdowsi, Avicenna, Rudaki; "Here, in this region, the language is Persian, and the kings of this realm are Persian kings."
Safavids: combining Persian administrators with Turkic figures, the Safavids brought back the concept of Iran as a large empire in the region, reviving Iranian imperial pride and holding off the Ottomans. Instead of Orthodox Zoroastrianism like the Sassanids, this dynasty used Shiaism to unite the country to battle the Sunni Ottomans