Obviously, any of the 'New Who' Doctors - especially David Tennant. [swoon] Also, the cast of Supernatural. I've seen them each year at Nerd HQ and at SDCC online, but I'd super love to see them in person - and have The Impalas play a concert!
Christopher Eccleston would be my top pick, but he doesn't do conventions :( Actually that's probably for the best, I'd be at risk for a restraining order if he did... I'm also a huge Lee Pace fan - can we start a petition to bring him to DragonCon 2016? ;)
I second David Tennant, Jensen Ackles, Jared Padalecki, Misha Collins, Osiric Chau (poor poor Kevin), John Cho (with a sword please), Zachary Quinto, Benedict Cumberbatch (2 fandoms overlapping) - Omg...I almost forgot Tatiana Maslany and Jordan Gavaris
YES! Orphan Black PANEL!!!
I totally agree about Supernatural and Orphan Black - both casts seem to be really fun in panels and truly enjoy their fans (and I heart Misha Collins.) Also, Bill Nye has the childhood nostalgia and science street cred that might make him the perfect panel host.
Kristin Bell in a panel with Felicia Day or some other geeky ladies would be fantastic---- a girls only panel that wasn't about "how hot you looked in this show" and was empowering.
My list covers a broad spectrum. I second Bill Nye, obviously the new Doctors, Kim Harrison who is my favorite author, Markiplier and other YouTuber geeky celebs.
Gary Oldman has been my dream guest for many years. I've been a fan since Bram Stoker's Dracula. His roles in the Dark Knight trilogy and the Harry Potter films make him the ultimate geeky guest! He's done a few cons on the west coast in recent years, and apparently he's very interactive with fans. His panel would be intriguing; think of all the iconic roles he could discuss!
I second a 10th Doctor Who cast panel as a winner. Maybe even better than that would be the Firefly cast. I'd be dead. And lastly, Ian McKellen and Patrick Stewart together would blow congoers' minds.
Who is your dream guest for DragonCon?