When it comes to villains in the Marvel Cinematic Universe, Thanos and Erik Killmonger top the list as some of the very best. They were quite nuanced, making fans connect with their vision. Thanos wanted population control to create a healthier galaxy, while Killmonger wanted to break society's modern colonial chains.
Source:https://www.cbr.com/secret-invasion-gravik-more-dangerous-thanos-killmonger/