User blog:Inept Wiki User/Who should voice the unvoiced characters?

One of the things that I sometimes wonder about is who would voice certain currently-unvoiced characters, if and when the time comes for them to be voiced.

For some characters, someone in particular may spring to mind fairly quickly, for others several, some are less certain, and there are often a few possibilities that might be overlooked. I seen a few discussions on the matter in certain places, with some interesting suggestions. I thought it might be interesting to ask everyone here what thoughts they have on the matter, so if it's alright, I'll ask:

Who do you reckon should voice certain unvoiced characters in the Toaru series?

Below are some lists of characters which haven't been voiced as of December 2013 and when they were introduced (there are probably a few missing and quite a few mistakes in places, for which I apologise).

Shinyaku Toaru Majutsu no Index
Edit (01/10/2017): With the announcement of Toaru Majutsu no Index III, as well as other hinted works in the Toaru Project, now seems a good time to revisit this topic. Any thoughts?