Something worth noting is that we see some pureblooded Garleans that aren't tall, lanky or even have pale colored skin/hair, on the Prima Vista.
So while most purebloods we've seen so far adhere to specific physical traits, it looks like they can look as diverse as any Hyur, the single most common characteristic being their third eye of course.
Using a Roegadyn with red skin might be tricky. No Hyur have red skin, and Roegadyn have distinct facial features that sets them apart from Hyur. As others have stated, Elezen usually do the trick if you want to go for tall and/or lanky. Of course, if you're dead set on that course, go for it!
So while most purebloods we've seen so far adhere to specific physical traits, it looks like they can look as diverse as any Hyur, the single most common characteristic being their third eye of course.
Using a Roegadyn with red skin might be tricky. No Hyur have red skin, and Roegadyn have distinct facial features that sets them apart from Hyur. As others have stated, Elezen usually do the trick if you want to go for tall and/or lanky. Of course, if you're dead set on that course, go for it!