1. Ollivander from the Harry Potter series by J. K. Rowling - His first name was apparently revealed to be Garrick on Pottermore. I have always found him one of the most fascinating "minor" characters in the books. Anyone who is that charming in a supporting role deserves a book of their own. Wand-making adventures, imagine that.
2. Dick Hallorann from The Shining by Stephen King - Oh, we do see more of this guy in Doctor Sleep, but that wasn't nearly enough. He is one of my favourite Stephen King characters, because he makes few appearances and still leaves an impact. I'm sure you'd agree he needs a book of his own, about how he discovered his shining, how learned to use it, or his life after the Overlook incident.
3. Francis Adirubasamy (Mamaji) from Life of Pi by Yann Martel - I love this book. And Mamaji, the swimmer responsible for the tragic French naming of Piscine Molitor Patel, is one of the most eccentric, brilliant characters ever. Pi does tell us a lot about him in the earlier pages of the book, but I'd love to read a book about the man, even if written in a vastly different vein from Life of Pi.
4. Professor Van Helsing from Dracula by Bram Stoker - If we count all the Dracula fan fiction ever created, I'm sure there are books on Van Helsing. I have seen the Hugh Jackman movie, which in all honesty, sucked. But I just wish Stoker had written something on his history. He is such an interesting character.
5. John Uskglass (the Raven King) from Jonathan Strange & Mr. Norrell by Susanna Clarke - God, I wish she'd write a book on the Raven King, already. You just can't create such a big, legendary character and basically only look at him from the points of view of two stuffy Englishmen. It's not fair, the ruler of Faerie deserves more.
This is the topic for Top Ten Tuesday today, over at The Broke and the Bookish. Hop on over to participate! Which minor characters would you like starring as leads?