I’d strongly add Goliaths to that list.
Also the idea they’re the same as half-orcs is laughable, to me.
I have considered Goliaths, they are clearly in Forgotten Realms, Nentir Vale as important races, but I can't think of another, maybe Darksun as Half Giants? That is what they did in 4e, they used Goliaths as Darksun Half Giants (which some more main stream sources suggest they might be, half stone giant, half human ,but that is just one if several possible origins).
If so yeah, putting them into the next PHB makes sense.