 If you liked
Gear Fighter Dendoh
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 ...then you might like
Nekketsu Saikyou Go-Saurer
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Schoolkids piloting giant robots in an current day setting. Both feature a comedic yet also serious setting with a mechanical enemy force, both have a bit more depth than it seem as first and also feature themes such as "growing up".
Ultimately Go-Saurer is more comedic and episodic, Dendoh has a more elaborate and "adult" (for the lack of a better word) story arch. Both are highly recommended.