Something really bright but not green, Maybe a purple/blue/pink/red?
That's going to be a tough order to fill. There are some blue-ish variants of anthelia/sansibia, but I wouldn't consider them "long-tentacled". One thought would be a long-tentacled plate coral, but I've never had a lot of luck with those. But the colors you list are not really normal colors for LPS
corals with long tentacles or wavy polyps. If you're looking for those colors, watch out that you don't end up buying an artifically colored/dyed coral.
Another thought would be a Duncan (Duncanopsammia axifuga). They will branch and when extended are quite long and wavy. They look like mini anemones on stalks. However, they're the normal tan/green color like most LPS