Complex sentence: Stephan served initially as the Bishop of the new settlement, but, having been charged with corruption and sexual misconduct, was swiftly expelled from the settlement, leaving Walther as one of the most well-respected clergymen remaining.
Split into simpler sentences: Stephan served initially as the Bishop of the new settlement. He was swiftly expelled from the settlement, leaving Walther as one of the most well-respected clergymen remaining.