As long as I have a coordinated team with decent support, I've had a lot of success with Rein lately with backward charges.
If we have another soaker/brawler like Zarya at the choke, and we have a pick or are close to a breakthrough, I've been able to get around behind the enemy (short flank route: never long) and charge back into my team.
It's won a few games outright. Best if the off-healer is Zenyatta and I have an orb, but even in competitive the other team often doesn't see me. They assume (I assume) I'm charging my shield while Zarya covers.
The best part is that I charge past my other tank and into safety, usually pulling their Mercy with me.
It's a high-risk move, but I starting winning more games when I started doing it if the opportunity presented.