yes I have frozen basil and it keeps its fragrance at least, nice for sauces etc. In an ice cube tray with some water then into a bag afterwards.
Oregano would dry OK I would have said? Your chives will go on for ever. They are very hardy, I find them all over the plot still ha ha. They will die back then come up again in the spring. I have overwintered parsley and the next season it is better than ever. And I am notoriously hopeless at growing herbs.