I would not plant them all together like that. There are a couple of things you need to consider.
Some of these plants are perennial in California (rosemary, oregano, parsley). The peppers and onions are annuals. So once you harvest the peppers and onions at the end of summer, do you have a plan to fill in the empty spaces left by them? Or do you want to plant perennials in a separate bed so that you can just start the whole annual bed over every season?
Also, cilantro and parsley will bolt faster if you have them in direct sun all day, but the other plants you want to grow will love being in direct sun.
