I'll vouch for GDP (my fav)..only problem is I wouldn't know if it helped anxiety since it knocks me The F.O..LOLThe ratios of THC to CBD of cannabis strains is the main factor for treating anxiety. But everyone is different and its definitely a trial and error testing game until you find the perfect strain and ratio that works for you. Even the different Indicas will act differently. Also, start out with a very low dose. The lower the dose the better for anxiety until you get some tolerance. To much no matter the strain at first will not make you feel good.
Here are some of the strains which can be helpful for anxiety:
3.Girl Scout Cookies