PS. As for your recent comments/using Richards as an example ---
--- he is a limited "shapeshifter", as he can look ripped/Hulk-like whenever he uses his powers.
Both his physical appearance and high IQ are likely both affected by his powers (Stark comments on that in the mainstream continuity comic, it's not just limited to the Ultimate Universe, no, that's what Galan wants you to believe).
Who knows, perhaps 100% depowered Reed would look like Krisblaze... or total opposite, like Gecko.