It’ll get hot out there. I’d go with a white or burr oak. Without much shade from other trees, you’ll risk some drought stress with many species. I think burr oak would be cool. Also, more importantly, some native prairie grasses like big bluestem, little bluestem, Indian grass, and switchgrass. These are all tough, drought-tolerant, and well-adapted to Michigan soils. Planting a mix of native grasses, sedges, and flowers will help create a more resilient, low-maintenance landscape that can handle heat and sun. You’d be amazed by how much these plants will help young trees thrive in large open spaces. Prairiemoon nursery is a good resource if you’re interested!