Tomato hasn't had a stable release in 9 years.
OPEN-WRT is a fork of DD-WRT. Lede was a fork of OPEN-WRT, but has remerged with OPEN-WRT. OPEN-WRT is the best firmware for home routers/access points in my opinion.
It used to be that dd-wrt was less open than openwrt, but worked better. I think now, though, openwrt has surpassed dd-wrt.
If you have the luxury of buying new hardware, I would go the OpenWRT route but just make sure you read EVERYTHING on the hardware support page before pulling the trigger. If you're trying to convert an existing router, definitely do research on both, there are advantages to each. Personally if I had a router supported fully by both, I'd go OpenWRT at this point.