The Good - I would've put John there but you already have him as a soldier, so my next choice would be... Sherlock and John. They present the good when they're together, don't they? So the scenes where they laugh together or really do anything.

The Liar - I'm not sure. Maybe Irene Adler? After all she is kinda lying about stuff, keeping secrets at least. Or exchange Mycroft for the liar and Irene for Prophet? Though I'm not sure how that would work. Or putting Moran as a Liar? The scene from the bank, him in a suit?

The Victor - absolutely no idea. Moriarty probably?

Edited to add: Maybe put Moran to Liar and Irene Adler to Victor. After all, she survives everything:-D