I got Rebel teams for days, and I don't even have most of the R1 characters. Here are my two favorite weird ones that are off-brand, and no one expects (or knows exactly how to deal with):
zCLS (L), Leia, zOld Ben, zCassian, zFulcrum. Between Cassian and Leia, Fulcrum ends up with enough buffs to unleash some serious damage with Whirlwind. She's crazy tanky, CLS takes care of himself, Leia's invisible, and Old Ben protects everyone. Surprise kills everywhere.
Ackbar (L), zHan, zChewie, Hoth Scout, some tank (Old Ben if not on the above team, or STH, or Kanan, or Hoth Solider, or whoever you like). Whaaaaat, you say? Han and Chewie on this garbage team? Exactly what people think. But Hoth Scout gets a double turn just like Han Solo when either uses their unique. With Chewie guarding Scout and Ackbar giving free attacks, it's all shooting all the time. You'd be shocked how many TW/TB teams I've taken out with this one.
Another decent one is Wedge (L), Biggs, Rebel Officer Leia, Lando, plus a tank of your choice. The great thing about this team is that everyone knows Wiggs is like a knife cutting through a single enemy like mad. But with Wedge's special, Leia's special, and Lando's special, you also have SERIOUS AOE damage over and over again. This team dies quick but works great against lots of unsuspecting teams, including weak to medium-strong NS.
Play around with these and let me know if you like any of 'em! =)