Scott MacDonald, seen here without alien makeup (He was Tosk and a Jem’Hadar in DS9, an alien posing as a Romulan in TNG and the Insectoid Xindi Commander on Enterprise).

Scott MacDonaldBabylon 5A Call to ArmsHe was also in the voyager premiere as a human - forgot abt that - no makeupBabylon 5 RewatchA Call to Arms Rewatch