I have too many favorite orchestrations, but I'll list a few here:
Otto Langey & Victor Herbert: Babes in Toyland
Harold Sanford & Victor Herbert: Eileen
Frank Saddler: Have A Heart
Robert Russell Bennett: Show Boat, Oklahoma!, My Fair Lady, Camelotr
Phil Lang: My Fair Lady, Camelot, Li'l Abner, Hello, Dolly!
Hans Spialek: Anything Goes, Pal Joey, Babes in Arms
Don Walker: She Loves Me, Carousel, Greenwillow, Cabaret, Fiddler on the Roof
Ted Royal: Brigadoon
Sid Ramin & Irwin Kostal: West Side Story, A Funny Thing Happened on the Way to the Forum
Red Ginzler: Bye Bye Birdie, Wildcat
Red Ginzler & Sid Ramin: Gypsy
Hershy Kay: Candide, On the Town, On the 20th Century, 110 in the Shade
Jonathan Tunick: A Little Night Music, Goodtime Charley, Sweeney Todd, Follies, The Grass Harp
Michael Starobin: Rags, Assassins (Recording)