Best Non-Gundam Mecha Franchises?

Always liked giant robots (Transformers and pacific rim are a core part of my being), but never made the jump into Japanese mecha until Armored Core VI got me hooked like very few things have before period. Now I’m watching Gundam 08th MS Team and loving it (didn’t get through the intro before making a HLJ account and buying some Zakus my friend recommended to me), and plan on watching Patlabor afterwards.

I’m already in too deep, so my only question is what are the best shovels? Metaphorically.

That brings me to the title. What are the best non-Gundam mecha franchises that I should check out? Games, manga, shows, movies, anything; doesn’t even have to be Japanese. In terms of games, I have a PS5 and Xbox Series X, so I can’t emulate.

I’ve already seen Gurren Lagann, Code Geas, and personally did not like Darling in the Franxx. Eureka Seven, Gridman, and Macross are all on my list.

Thanks!