There's Jill Stein running on the Green Party ticket*, who's basically Sanders but not as...Sanders? She's Sanders lite. If you're going to vote on principle rather than against someone, she's probably your best bet. And please, PLEASE vote. Even if it's not to a major party. Because every vote counts, even if it's for a losing candidate. This goes for all of you. Because if enough people vote for a 3rd party, it still sends a message, AND you can still vote down ticket to vote in preferential candidates on the house and senate and still help keep the people you don't want in, out. And more importantly, when some douchebag says "well why didn't you vote?" You can honestly say "I did." And you can even say you voted your conscience instead of for the lesser of two evils.
*I suppose you have Gary Johnson running too, if you like insane people. For those who don't know, he's basically Ron Paul but....well, he's Ron Paul lite. Just as crazy, but with less political influence. He's...probably the most big R Republican in the race, Sanders and Stein are the only two true liberals in the race, Clinton is the most little r republican in the race, and Trump is...Trump. He's more liberal than Clinton on a few things, and more conservative on a few things.