This is not a full list because many of the IOTA developers have not been publicly introduced yet. Feel free to add anyone if I have missed anyone by using the reply button. The list is supposed to expand in the future as well.
Business developers
David Sonstenbo
Dominik Schiener
The Foundation members and advisors are also helping the business development
Technical developers
Sergey Ivancheglo (@Come-from-Beyond in the community)
Wesley (@atypical in the community)
Serguei Popov
Cyril Grunspan
Chris Dukakis
Andreas Osowski
Sabri Goldberg
Paul Handy
Alfred Keller
Alon Elmaliah
Lewis Freiberg
Olivia Saa
Paulo Finardi
Danny Wu
Bartosz Kusmierz