Mego released The Black Hole action figures in two series in 1979 and 1980.  The first series included Holland, Durant, Reinhart, Booth, McCrae, Maximillian, Pizer, and V.I.N.Cent, the second series included Humanoid, Old B.O.B., S.T.A.R., and Sentry. Sentry was the only second-series figure released in the U.S. the others were released only in Canada and Italy, and are very scarce.
The six humans (Holland, Durant, Reinhart, Booth, McCrae, & Pizer) and the Humanoid all have 10 points of articulation: neck, shoulders, elbows, waist, hips, and knees.  The Humanoid is argueably one of the rarest 3 3/4" action figures.