Another would be Basswood, sometimes call "Lynnwood" or "Linden" which is the carver's dream. It is light, but totally blah for character. The sapwood will usually be a rather milky white, although the heartwood gets darker.
It bleaches well with 2-part A/B bleach, but does not, from my experience, take stain well. A self-sealing acrylic varnich like Fuhr 355, or good waterborne lacquer such as Target Ultima will keep it white, but the bleach must be properly neutralized.
Mark