Haven't tried the cherry or strawberry teas on their own (have had strawberry in blends, though), but I'd bet strawberry would be a lot less tart than the blood orange. My favorite herbal tea is "peach tranquility" from Teavana (*gasp! I know. I hate their store practices, but I haven't been able to find a comparable peach herbal anywhere else): dried peaches, chamomile, sunflower petals and rosehips! Love it... But I'm getting off topic!
Again, I'd go with the strawberry, or make your own blend and put in a smaller percentage of blood orange and maybe some lemongrass or other stuff that you like. Hope this helps a bit!