Like I mentioned, those were just some random riders, that came to my mind at that moment, who don't fit into my personal image of an ideal bike rider's aesthetics. And obviously, I agree with you that no one comes close to Froome in terms of how bad you can look on the bike.
As for Roglic, imho they way he rides, his position on the bike etc don't look natural at all. He started cycling at the age of 22 so he'll never have an ideal, natural on-the-bike aesthetics. Of course, he's incredibely powerful and the way he rides is very effecient, but it doesn't automatically give him the aesthetic value. At the age that Promiz rode his first race, Mathieu was already a multiple CX and road WC, training and racing competitively on the bike since 10+ years. That's why his moves on the bike seem that super natural and pleasant to watch for a cycling fan.
Anyway, like you said, in the end it all comes to the personal preferences, but calling Roglic the marvel of cycling (considering the visual aspect of him as a cyclist, not his performance) is out of place, mainly due to his late coming into the sport. And don't try to change my mind.