It sounds like you have a great base set of pieces to work around; to complete the "bottoms", if you like skirts I'd suggest picking up at least 2. To get started, I'd suggest looking for a few tops and jackets, then on to shoes, then decide from there. Once you get those pieces in you'll start to have an idea of what you feel you need more of; without knowing this you may end up with pieces you don't wear often and this certainly doesn't help save money.
For tops I'd suggest 1-2 each: tunic type tops (to wear with jeggings/leggings), light sweaters (to wear with skinnies/bootcuts/cargoes), blouses (to wear with skinnies/bootcuts/cargoes). From there you can start to get a feel for the types of tops you like and what's missing.
For jackets I'd suggest a blazer and a fitted military style that suits your shape and fancy. Jackets are tricky, everyone likes different types. You'll want to have 2 or 3 to start working with and then you can go from there.
Once you've got a few new tops and jackets you'll probably start to get a feel for shoes that are missing. And once you've gotten a pair or two of new shoes, you'll have a pretty good basic wardrobe set up
I'm sure you can get lots of good suggestions on pieces by the members here! Since your style is eclectic (as is mine) I'd suggest writing down a handful of details that you're particularly drawn to and see if you can think of how you can match them up so your pieces play nicely together. E.g. military, ruffles, stripes, bold jewelry: a striped top with a military jacket over black skinny jeans; a ruffled top with a long necklace over skinny cargoes; 2 layered tanks with a bold necklace and a blazer over bootcut jeans. Good luck!