Cinta, have your tried any of the yellow tansies? I think they have much the same properties as vulgare, perhaps not as strong. Nice pretty pop of foliage color, and easy care.
Chelle, I love feverfew. It does not over-winter so much as reseed itself for me. I let it grow here and there to give a bright white pop that is not too overpowering or too robust. I've had some really pretty combos over the year, usually not to be repeated quite exactly. How fun is that.