@engineer,
First of all I should retract the word "proven" from my prior post because to use it is be inaccurate. To my knowledge, none of the charges against Clinton were ever actually proven in a court of law.
[He was, however, cited for contempt of court by Judge Susan Webber Wright for "giving false, misleading and evasive answers that were designed to obstruct the judicial process."]
As for accusations, there need not be an accusation for sexual harassment to have occurred, but there were still plenty of accusations.
Paula Jones sued Clinton for sexual harassment and Clinton settled the case for $850,000 (Quite a bit more than what we've heard concerning the Cain case)
The Clinton-Lewinsky affair is a classic case of disparity in station and while Jones was suing Clinton, Clinton's long time friend Vernon Jordan was helping Lewinsky get a job.
Juanita Broaddrick didn't accuse Clinton of sexual harassment, just rape.
Gennifer Flowers had, by all accounts, consensual sex with Clinton but sued Stephanopolous, Carville and Hillary Clinton of defamation for a smear campaign launched after she went public with her affair with Clinton.
Kathleen Willey (not previously mentioned) was a White House volunteer aide who alleged on television that Clinton sexually assaulted her during his first term.
To my knowledge, none of these women other than Flowers actually sued for defamation, but all were subjects of Clinton & Co smear campaigns