Try Genevieve Gloor. Here is her website: https://www.mumarazzi.com/families
I haven't had a chance to book in with her yet, but I have seen her work and it is absolutely beautiful. She takes very natural shots that really capture the characters of the individuals and the family.
I have had photos taken by Sasha de Paz in the past, but she only takes photos of kids, not the whole family. Her photos are phenomenal and working with her was really easy. Despite the fact that my kids were 18 months and 4 years at the time and ran around like headless chickens in the park, she managed to get some really gorgeous photos of them together and separately. Her website is: http://sashadepaz.com/