...Without all Techs? Because I keep hearing people mentioning that the Repbublic is great because they have Stealth Jedi, and I didn't think they did..

The Republic Jedi are the most powerful in the game; they've access to all the Jedi powers even outside of "all tech" mode.

Kryllith

Yes you are right.
The tech you need for this is called Jedi Mind Trick.

As a fully trained (and knowledgeable) jedi master who would be on the council if he listened to them, I say through experience, the answer is yes. The republic is the strongest. not only do they have stealth jedi, but jedi masters are extremely good. if you set a lot of workers gathering nova & food, your best bet for winning would be to train fully upgraded jedi masters when being the republic, along with some aa troopers (Anti Air troopers) for aircraft.