1. Force Chokes him to death while fending off any attacks with his saber.
2. The duo lasts a little while against him, but he definitely takes them. He took on Jinn and TPM Kenobi, 2 on 1, and nearly won, and that duo's stronger than this one. Plus Maul wasn't at full strength during the duel with Jinn and Kenobi.
3. Again, some trouble, but he definitely takes it.
4. Obsession if 5 months before - Asajj > Anakin 6 months before, so Maul could take him, same as Asajj. Anakin could maybe take him if he used the Dark Side, but either way it's close.
5. Maul wins here again. Really, 2, 3, 4 and 5 didn't really get any harder, just stayed even. Doesn't the TPM novel say that Jinn is close to Mace with sabers? So if Mace is only a little but ahead of Jinn, and a not-at-full strength Maul beat Qui-Gon in 30 seconds, he takes Mace as well. He also beat Anoon Bondara who is, supposedly, ahead of Mace with blades. Again, it's tough, though,
6. I'd say Maul ends his region of terror here. "Need I demonstrate the powers of Master Windu or Cin Drallig? Obi-Wan or, starts help you, Yoda?" (don't bash me if I got that a little wrong, I'm going by memory). That's what Dooku says to Grievous, for a long time it made it seem like that was putting Cin above Grievous, and that's EU Grievous, who's above Maul. At any rate, it seems like Dooku would have named the top Jedi in the Order, it wouldn't have made sense to name someone who's not in the top to scare Grievous, and Cin's in there, so. Close again, though.
7. Same condition? Grievous beat them without that much difficulty. They were tired as hell and scared, too, I'd say Maul has a 50/50 chance here...
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Who's Solid Snake? Couldn't find him on wookieepedia, either... 😕