Here are some pieces that work well together and with those you currently own.

The Tinsley has an adjustable hem, and the Abby would be great for a power casual summer look.

Not sure how you feel about the candy red Beck, but I thought I'd include it for you to take a look at since I know you like the Beck silhouette. 

Please let me know your thoughts. I'm happy to make any revisions based on your feedback. Thank you!