Roll20 Game

I'm trying to set up a Roll20 RPG campaign. I might be the GM, someone else might be, but either way there's not going to be one without players. I'm also inviting a few people from my IRL gaming group, as well as a friend/coworker who really wants to try playing but can't travel to where my gaming group plays. I only just posted to Facebook asking the gaming friends, so I don't know if they are interested or not, but even if they all are, I'm only inviting three of them, with the coworker that makes four, so there would still be room for one or two more people at a bare minimum. As far as when the sessions would be, I'm currently thinking either Monday nights, Friday nights, or sometime over the weekend (GMT -5 currently, -6 after daylight savings time ends in early November). I can vouch for all of the people I've invited as being respectful and decent people.

System-wise, nothing is decided yet. Here are some options, although this is by no means exclusive, additional suggestions are welcome.

Systems I have the capability and info to GM:
D&D 3.5e
FATE Core
Dresden Files RPG
Gamma World 7e
Pathfinder

Systems I have played but don't have the experience and/or sourcebooks to DM:
D&D 4e
D&D 5e
Shadows of the Demon Lord
Ironclaw 2e
Legend of the Five Rings 4e
Rune Quest 6e

Systems I haven't played, but have sourcebooks for and would like to try:
Eclipse Phase
Legend
Ars Magica 5e
13th Age
7th Sea
Contagion
Shadowrun 5e
Laundry Files
Atomic Robo
Numenera
Scion 1e
Miscellaneous stuff from DriveThru RPG that I haven't unzipped since downloading; I'll go through them this weekend and list any good ones. 

With the exception of D&D 4e and 5e, I have PDFs for all of the above which I am willing to share with players on a "don't screw me by reposting this" basis. Seriously, they're watermarked and I don't want to get blacklisted from DriveThru RPG or Humble Bundle.

If there's enough interest in this to actually get it off the ground, I'll set up a Discord server or a Skype group or something, depending on which is more popular.