1. House of Pho. We have been here over 4 dozen times. I can only think of two times where the beef broth was not up to snuff. Generous amounts of broth and noodles and they have beef tendon available, which I'm a sucker for! Their fresh spring rolls are also among the best in the bunch. Bonus - Bah mi sandwiches. Service is usually good.
2. To Pho - Service is stupid slow here so don't expect to get in and out. But their Pho is very good and they have things on their menu not seen at other places (pork belly buns before it became a "thing"). They also have several spicy soup offerings guaranteed to kill any bacteria residing in your respiratory tract.
3. Asian Noodle House. In all honestly their Pho is ok. But their Wonton Soup bowls are the total bomb. Get a super bowl (hard rice noodles, pork and wontons) and ask for extra wontons. It's basically a utilitarian dive place but we've been going here for over 15 years and are frequently the only white people in the place. I know a place is authentic when it's packed with people from that region. Service is usually super fast.
4. J Pho - When they are spot on their Pho is the best! However we've had a few times when it's been just - meh. They also tend to get a bit overwhelmed and service can be slow. Still, if you hit them on a good day their Pho would rival the best in Chicatgo.