A DSB modulator normally suppresses the carrier.
As Uncle $crooge says you need to post the schematic exactly as you built it, otherwise we can not determine why it doesn't work. Saying you "had no output" doesn't tell us much. You can draw the schematic with a free computer program such as Tiny Cad.
I'm quite sure the circuit, as generated by the program, will provide the given response if the op amps are properly connected and powered.
For example you said you used two resistors where ground was needed. Where do these two resistors go? If they go between power and ground they need to be decoupled with a large capacitor from the junction to ground.
For the differences between the various filter types and configurations do some searches for "active filters", etc. on Google and Wikipedia. Then ask us what you don't understand.
Of course higher order filters give a faster rolloff but we can not determine what your requirements are for the SSB signal. That's for you to determine based upon what exactly you are trying to do (of which you have given only a vague description).
For more gain just add an additional op amp circuit with gain.
We are here to help you to do the design, not do the total design for you.