Sure he gets props here and there but considering how WAY ahead of his time he was in his thinking and vision...why isn't he up there with the Martins and Malcoms?
Because white people are actually the ones that are really pushing the legacies of these leaders out there to the general public. EVERYONE learns about Martin Luther King Jr. as a kid through public schooling plus holiday, movies, et cetera; a lot of people will learn about Malcolm X early as well through the same methods, Rosa Parks, etc.
Unless you're doing independent research, you're not really going to know much about Marcus Garvey.
And it also has to do with the eras they came up in. Malcolm and Martin were in the Civil Rights Era. A lot of Black leaders who came before them haaev been "phased out" of the memory of the general public.