The Chris Christensens are very large and go pretty far down. We use them primarily for super thickly coated dogs. Depending on how long/thick his coat is I might recommend one with shorter bristles. Here’s a copycat Christensen that one of my coworkers recently purchased that’s much cheaper https://www.amazon.com/Slicker-Brush-Massage-Grooming-Stainless/dp/B08LD27PZJ/ref=mp_s_a_1_8?crid=3O2DR0YZ0ZDHN&keywords=slicker+brush+for+dogs&qid=1666501327&qu=eyJxc2MiOiI1LjQ4IiwicXNhIjoiNS4wNSIsInFzcCI6IjQuODUifQ%3D%3D&sprefix=slicker+%2Caps%2C95&sr=8-8

The comb is a good choice, it’ll help you find knots and make sure everything is brushed out.

For the rake I like furminator products but I’ve never used that one before. I usually use a rake on super heavy shedders.