I have a Betula jacquemontii (Himalayan Birch) that I planted at the same time I did the Maples. Great tree. Moderate growing. Is susceptible to the caterpillars so I gotta watch. It also loves to spring new growth at the base so to keep it as one trunk, I need to trim it every year. It’s about 15’ tall now, about double the size when I planted it.