Not sure Iran is the best example - it is effectively surrounded by nations who want nothing more than to topple its leadership in favor of another West-friendly regime. Look at all the confirmed CIA activities listed in OP's article that have gone on in Iran. I chalk anything they do up to existential self-defense at this point.

Turkey isn't a great example either due to its NATO membership; their geopolitical motivations aren't that easy to pin down.

And yes, China acts very territorial towards Taiwan and the regional oceans. Taiwan and the surrounding ocean is the one exception to my statement; given the opportunity they'd take it without hesitation.

But for all those countries you listed, I really believe they would remain strong regional powers and not try to dominate the world the way the US does. Shocking as it may be to some of us in the British/American sphere of influence, most countries do not have imperial ambitions, and our opinions of places like China are heavily influenced by the military-industrial-media complex seeking to gin up resentment against foreign powers who don't bow to Western economic influence. (Much criticism of China is valid; that's beside this discussion specifically about imperialism).