Breed(s): Thai Ridgeback
Coat suggestion: They usually come in red, fawn, blue, and black I think. I honestly wouldn't care which one, I just love the breed and no one ever makes adoptables of them. The one pictured below in the reference is a fawn one. ^^
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Breed(s): Azawakh
Coat suggestion: I think it'd be nice to have a red one with some kind of white markings, like the one pictured below. It's the most common type of coat, I think, so if you image search it you'll find a lot more with a variety of white markings.
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Breed(s): Borzoi
Coat suggestion: White base coat with brown markings, like what is pictured below, but you could do whatever you wanted with the brown markings - there is a lot of variation possible.
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Breed(s): Cane Corso
Coat suggestion: definitely the blue coat - I think those are prettiest ^^Also, I really prefer them with natural ears.
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I'll post more if I think of any! :3