I used Industry Giant 2 as a big inspiration when I made it all these years ago. I even met the original designer, who gave me his blessing. It was a good day :)

If you don’t mind other settings than 2000s industry: Anno (all of them), Settlers 2, Tropico, probably Northgard.

Anno, Port Royale, Transport Tycoon.

Have you considered Open TTD? You might like it!

Capitalism Labs is a continuation of Capitalism 2 which is great if you like the business side of things.

I might perhaps add: https://store.steampowered.com/app/1594320/Captain_of_Industry/

still in EA tho