With the help of that Brickset list, I've added to my list of Lego designers. I have 41 so far, there's plenty of people involved. Here's some highlights (many well known already, obviously):
Adam Grabowski - anything you'd care to mention from 2008 to now. Indiana Jones Temple Escape, Tantive IV, UCS Imperial Shuttle, Queen Anne's Revenge, Haunted House, Vampyre Castle (with RPRP), Silver Mine Shootout and the UCS Tumbler.
Adrian Florea - early Chima sets, and Ninjago sets ranging from 2011 to now. Temple of Airjitzu and both Destiny's Bounty sets.
Bjarke Lykke Madsen - Death Star, Hogwarts Castle (2010), Tower of Orthanc (with Jordan Scott and Hans Henrik Sidenius) and Unexpected Gathering.
Daniel August Krantz - Yellow Castle (yes, the very first Castle set), Guarded Inn and Message Intercept Base (Blacktron).
Henrik Andersen - both Sopwith Camels and Taj Mahal.
Jamie Berard - anything big and awesome not listed elsewhere
John-Henry Harris - Volkswagen Camper Van
Marcos Bessa - all Quinjets, Arkham Asylum Breakout, Ewok Village, Ecto-1, some Movie stuff, Simpsons sets, Milano, Helicarrier, X-men vs The Sentinel. Basically the Jamie Berard of licensed sets.
Mark Stafford - stuff from Power Miners, Alien Conquest, SP3 etc. Notably the Exo Suit and the Samurai Mech.
Niels Milan Pedersen - probably a ton of stuff from the 80's, but King's Castle and Black Seas Barracuda are very notable.
Raphaël Pierre Roger Pretesacque - Vampyre Castle (with AG), Imperial Flagship and Spaceship^3.
Samuel Johnson - The Golden Dragon, Croc Swamp Hideout, Doctor Who and the Nexo Knight Ultimate sets.
Tara Wike - lead designer of the CMF line.
Wes Talbott - Naida's Epic Adventure Ship and Skyra's Mysterious Sky Castle.