aanv- Welcome. Heh heh, that's some first post (I wonder what some members will think of your wanting a "less reflective" look), but I'll chime in. And whatever YOU like is what YOU should strive for
I DO know what you mean. My XJS looks EXACTLY the way I want it to with its old, single stage paint. I WOULD NOT like it with a super-reflective clearcoat and a synthetic sealant. It's just the way I want THAT car to look. Only silver car I've ever felt that way about, but there you have it. On black, I'm reminded of how older Cadillac black looked back in the days of old-school paste waxes (funeral home cars).
For your goals: stay away from the purely synthetic approaches (like
Klasse and Zaino). If you MUST use one for the added protection, top it with carnauba (one without "polymers" mixed in). Different waxes can look VERY different. I'll bet PPG and 3M Showcar Paste would be too reflective for you, for instance. What color are you working with?