Welcome to YT!
Fromm, Acana/Orijen, Royal Canin, and Blue Buffalo (among many, many other brands/types of food) are pretty popular here. If you ask 20 different people , you'll get 20 different responses of what everyone's babies do well on, so it's really a matter of what works well for your pup!
There are tons of suggestions in the YT Health & Diet section. You'll want to feed either a formula specifically for puppies or some type of all-stages food with higher protein/fat content that growing pups need.
You might even check out the 4 or 5 star foods on Dog Food Advisor just to see what's out there
Best Puppy Foods
Be sure to post pictures of your baby when you get him!