A few more I forgot about...
Corruption at the Trump Foundation-- not sure if Clinton would go here because of the corruption at the Clinton Foundation.
More on breaking the Cuban embargo (and working with other countries illegally).
Mafia ties (this could be Yuge!)
Tenant intimidation scandals- trashing apartment complexes, turning off water and electricity, and getting homeless people to go into apartments in order to get people to move out so he can tear them down and put up new buildings.
Hiring of illegal aliens. Always plaguing his businesses, especially bad based on the platform he is running on.
Casino fraud. Using fake chips to pay debts, conning customers, etc. This hasn't been explored much in a while. He had a lot of fines for these.
More antitrust violations than Wells Fargo and Bank of America combined.
Trump Institute- before there was Trump U there was Trump I... went bankrupt, accused of fraud.