Unless some action from the Chinese/Riady connection causes a future threat to the US or is a further embarrassment to Clinton, he will go down as an "Eisenhower.
An 8 year stewardship of a country flush with cash and mostly peaceful through no real action or inaction on their own.
A "Place-keeper", if you please.
Actually, he'd go down as a Coolidge -- which is exactly where they've already put him. At this point, that's about all they can do. It remains to be seen how future events will be shaped by Clinton's actions.
Right now, I'd say he has 9-11 in his "debit" column, and I think probably North Korea is headed that direction also. China is probably a wash, as far as Clinton is concerned. I believe history's going to give him a Neville Chamberlain stigma (much as has happened to Carter).
I will not be surprised when the Democrat party falls apart -- there's no way they can hold all of these extremes together; and I wouldn't be surprised if Clinton was seen as the agent of their demise.
Finally: corruption. I think more objective assessments will begin to build up over time, and Clinton's reputation will suffer for it.