I'll assume that you prepped your vehicle to the level that met your expectations. If so...IMO...That's the best your
SGM color will look, as reflected through the clear-coat paint film that you prepped.
You've already topped the clear-coat paint with WGDG 3.0... a very good, very protective, and optically-clear sealant...Thus, allowing the 'SGM color' to now be reflected through "two optically clear layers".
But if you really insist on adding to those "layers" with a wax....Try Meg's #26....Even though it's considered a 'hybrid wax'...It's optically clear when it cures....
Then I'd say: These three "layers" has got your vehicle covered!!
Even if you do not select Meg's #26 and opt for another wax...
When waxes start deteriorating they begin to "gray-out", and
therefore not be as optically-clear as it was from the initial application....Your SGM color will become occluded.
This "new-grayish-color" will be the first clue that you'll need to re-apply a wax, if you'd want. Or remove the remnants of what wax that remains. Maybe even starting all over again.
Bob