Walter Scott | Sir Walter Scott | Chuck Berry | Walter Cronkite | Walter Raleigh | Walter Benjamin | Halle Berry | Walter Mondale | Walter Matthau | Walter Gropius | Walter Hamma | Wendell Berry | Berry Gordy | Walter Savage Landor | Walter Burley Griffin | Walter Payton | Walter | Bruno Walter | Walter Winchell | Walter Crane | Walter Rilla | Walter Koenig | Walter Brennan | Knott's Berry Farm | Walter Sickert | Walter Pidgeon | Walter Isaacson | Walter Damrosch | Walter Crickmer | Walter Brueggemann |
Sigalas played regularly along with players like Eddie Johnson, David Rivers, Roy Tarpley, Žarko Paspalj, Willie Anderson, Christian Welp, and Walter Berry.
He performed as a soloist, but above all sought as a collaborator with singers such as Elly Ameling, Gundula Janowitz, Christa Ludwig, Walter Berry, Dietrich Fischer-Dieskau, Peter Schreier, Brigitte Fassbaender and Jessye Norman.