My aquarium is about twice the size, but I was originally planning on getting a 120. The stocking all really comes down to what your personal research and preferences are, so take this list as a suggestion only.
Here's what I would do with a 120:
-Instead of ocellaris, I would go with a type of skunk clown. They don't get nearly as mean as they age, and they are naturally more skittish, meaning they'll host anemones more willingly.
-My favorite tangs are the Ctenochaetus sp. tangs, specifically the Tomini and Oranglined. They stay smaller, around 5-6", and have a lot of personality.
-I would recommend trying a type of dartfish, such as a pair of firefish or zebra darts, especially if you end up having sand in the tank. They are full of personality, my zebra dart pair have accepted my cleaner wrasse as one o their own and try to clean my arm with him lol Very cool fish indeed.
-You could try a type of anthias, such as Dispar or Ignitus. Lyretail are fine, but I've heard they can get mean after they age.
-I personally love marine angels, such as Potters and Coral beauty. It is a risk adding them, and you have to add them after you are done getting new corals as they'll inspect anything new by tasting it. possibly getting a taste for coral.
-and lastly, jawfish. Jawfish are amazing little dudes, I had some a while ago but my LTA ended up eating them all. But they are full of personality and are just really cool fish.
-side note, something a lot of people overlook is that there are a whole ton of awesome inverts too. I personally like things like urchins and ornamental crabs like Pompom crabs, they give the tank another dimension.
Good luck with the tank! Forge your path and make it great.
God bless!