Am I reading correctly - the door is only 22" wide? Is there a door (and trim), or just an opening?

Option 3 (with curved clothes rods in the corner) is right out. Hanging clothes just don't work that way.

I think you need to allow 21 or 22" for hanging clothes. In your closet, 68" deep, if you hang clothes on the front and the back, that leaves you 24" to move around. I think that would feel awfully crowded. To see how it feels to you, hang a bed sheet in the closet, 24" from the wall.

If 24" isn't enough walking around space, you will be limited to hanging clothes on the back wall, and putting shelves on the side with the door (12 - 16 - 18" deep, depending on how much space you want/need for walking).

What will be in your closet? Will you have a dresser or chest in the bedroom, or is this it? Is it for one or for two people?

What do you wear for work? For at home? Do you garden? Do sports or gym? Do you accessorize with textiles or jewelry? Will you keep all that in the closet, too?

Without knowing any of that, I agree with Annkh: hanging space on the back wall only will make it feel the most spacious.

Use the two walls at the front for shelves and drawers.

On the side walls, have a full-length mirror on one, and flat storage on the other. By flat storage I mean hooks or a rack system for jewelry and accessories. On the sides of the shelves and drawers at the front, you might want hooks for your robe and favorite lounging sweater.

You don't have a small closet at all! But no matter the size of closet, how you use it matters.