Letraset’s and Varityper’s Futura are at least partly based on Twentieth Century, see the Extra Bold. So is the digital Futura No 2.
Monotype’s digitization has 19 styles, incl. 5 italic and 4 (upright) condensed styles, as well as 2 Classified weights for small sizes and one all-caps Poster style. LTC Twentieth Century (Lanston Type Company/P22) was drawn by Colin Kahn and covers the Medium weight, with small caps and alternates.