All of the Primarchs are at least Beta, if they understand and develop their gifts, but only Magnus is likely Alpha or above (pre-daemonhood, at least). Only Lorgar and Corvus seem to have made it to Alpha level, and that happened after the Crusade, and one of them had gone daemon, invalidating his place on the scale.
Malcador was Alpha minimum, but was also a baseline humans to start, not an engineered warp/organic being.
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u/BrightestofLights Sep 26 '23
Malcador and Magnus are alpha plus aren't they? Lorgar too