Rock Star Characters & The Almost Awesome

I'm of two minds when it comes to fictional characters I wish I'd created -- those who rock and those who need more time on the drum-kit.

The rock stars are characters so wonderfully written I eat, sleep, and breathe their world, motivations, and emotions long after the book is done. Someone mentions the author, the story, or even the one of the cast and I am instantly transported back into the magic I first felt upon discovery. I've a lot of those -- thankyouveddymuch, great authors -- but my top three are: 

1. Katherine from Shakespeare's Taming of the Shrew
2. D'Artagnan from Dumas père's D'Artagnan Romances
   
3. Cuchulain from Lllywelyn's Red Branch

Conversely, there are characters who surfaced with a great potential yet something was missing -- usually time on the page because they were secondary or tertiary characters (I'll refrain from mentioning characters who suffered from lackluster writing). These are the characters to whom I would devote entire books with full GMC personality and plot enhancements because I want to spend lots more quality time with them. My top three Could'a Been Contenda's are: 

1. Cernunnos from Llywelyn's Epona: The Horse Goddess
2. Ancaladar the Dragon from Lackey/Mallory's Obsidian Mountain trilogy 
3. Captain Hook from Barrie's Peter & Wendy

Who are your rock stars, readers, and who do you think is one solo away from stardom?