looks like you have a good starting point
chives -- very hardy and flower up very nicely, although you may want to de-head the flowers before they go to seed to stop it spreading too much.
avoid mint as it's grows too vigorously. i keep mine in a seperate pot
dill(annual) and fennel (perennial) are also useful, especially if you enjoy fish.
corriander grows like mad when the sun is shinning enough.
basil is also essential imho but may be better suited to in the green house as a companion to tomatoes or a sunny windowledge