I disagree with the suggestions to add more trees. I think you have a very nice start. Good, irregular spacing of your trees. Park Like? Not really, this is a planting in its first season, in very few years it will become more dense. You have reasonably good variation in trunk diameters. Not bad at all.
The pruning suggestions from
@Maloghurst are good. Eliminating one of the 2 heavy top branches is important. As the tops will tend to get heavy long before lower branches develop. In the future, balancing vigor to keep the trees in proportion will be critical.
Overall, a very nice planting.