Hi wojcia,
You've done fine work on constructing these piano teaching heritages. After consulting my own "genealogy", I'd like to recommend that you include the following:
Under Alfred Cortot: David Barnett (1907-1985), world touring artist, composer and professor at New England Conservatory of Music in Boston
Under Tobias Matthay: Albion Metcalf ( - ), German concert pianist and professor at New England Conservatory of Music in Boston
Under Ernst von Dohnanyi: Miklos Schwalb (1903-1981), Hungarian pianist and professor at New England Conservatory of Music in Boston
Under Isabel Vengerova (who also studied with Alexander Goldenweiser as well as Leschetizky): Anthony di Bonaventura (1930- ), world touring artist and Professor of Music at Boston University's College of Fine Arts