JHCCoffee
Find a coffee that offers what you want and extract it properly.
Not all will offer complexity, not all will offer full body. With your equipment, you can force a full-bodied shot with a low ratio but that will mean a low extraction and lack of complexity, and probably also a lack of clarity.
If it’s sweetness, complexity, and nuance you want then use a longer ratio. You’ll probably want a roast on the lighter-medium end of the spectrum too. If you want body then get a coffee from an origin known for it e.g Guatemala, Nicaragua, El Salvador or Asian coffees.