Meguiars, Wolfgang, Mothers, CarPro, Chemical Guys
Visit some good detailing centre and ask for a good wax, Meguiars is usually easy to find.
It also depends on the paint of the car, some paints look better with carnuba based waxes, and some look better with synthetic polymers. You have to test some products before finding a good one. Find pure wax, which is easy to apply and remove excess.
Whichever you can afford, never buy local waxes, china waxes, formula or whatever it is they put on super store shelves. Don't use cleaner, or abrasive waxes regularly.
Wolfgang is very expensive and hard to find, but it's one of the best.