Adapting Middle-earth for a contemporary audience can be done in a representative way, racially speaking, that does not diminish the original work at all. The inclusion of people of varying levels of melanin in Esgaroth as part of the third (second? They all bleed together in nightmarish fashion) Hobbit film is a good example. Lake-town was a trade hub, so it follows that folks from all over the east and south would end up there. I also would have no problem seeing dark-skinned Gondorians (or dwarves for that matter).
This kind of thing didn't really become important to me until I got super into Deep Space 9. Avery Brooks went out of his way to say in interviews that part of the reason he did Star Trek (besides the monetary benefits) was to show little brown-skinned kids that they can be captains, too. This can be a part of LOTR without "breaking" canon. People also often overlook that there are literally different peoples (species) represented in these stories, even if they all seem to have European heritage.
Anyways, I have no idea how we wound up here but I think Wandalf is on to something. New cycles, guys?