Nouns

(n)humanitarian, do-gooder, improversomeone devoted to the promotion of human welfare and to social reforms
(n)humanist, humanitarianan advocate of the principles of humanism; someone concerned with the interests and welfare of humans

Adjectives

(s)human-centered, human-centred, humanist, humanistic, humanitarianmarked by humanistic values and devotion to human welfare“released the prisoner for humanitarian reasons”, “respect and humanistic regard for all members of our species”
(a)humanitarianof or relating to or characteristic of humanitarianism“humanitarian aid”