I've been compiling a list of principal authors of textbooks for professional responsibility or legal ethics. This list includes only general texts and not, for example "Legal Ethics in ERISA Pratice." Some time soon I'm be listing specialized texts and secondary texts as well. If I've missed any texts below, feel free to add them in the comments. [UPDATE: I've added a few more that were forwarded to me by readers.]
Cochran/Collett
Coquillette
Crystal
Devine et al.
Dzienkowski/Burton
Gillers
Hayden
Hazard, et al.
Kaufman/Wilkins
Lerman/Schrag
Martyn/Fox
Moliterno
Morgan/Rotunda
Noonan/Painter
Patterson
Pirsig/Kirwin
Rhode (Pervasive)
Rhode/Luban
Schwartz Wydick et al.
Shaffer
Simon, et al.
Sutton/Dzienkowski
Wydick, Perschbacher et al.
Zitrin/Langford /Tarr