I personally have basil and lavender growing in small pots in the window of my bedroom. Basil can help promote prosperity and keep out unwanted energies. Lavender is a great herb for relaxation and peace, thus, a great herb for a room where we go to sleep.
In my daughter's room, I have lavender sachets hanging above her bed for much the same reason.
I would also suggest catnip and mint, as both are believed to attract positive energies. Mint is also associated with prosperity.
I have added a few links below that pertain to herbs and their corresponding aspects/magical properties. They may also help you decide on other herbs that might suit your needs. The book Herb Magic for Beginners: Down-to-Earth Enchantments ~ Written by Ellen Dugan is another great source for herb magic and such.