DnD 5E Compendium Expansions

I currently own the PHB, Volo's, Xanathar's and the Monster Manual for Compendium Expansions.  Which other ones are worth picking up?  Specifically ones that enhance the Charactermancer.   I wish I could buy them all but this stuff gets pretty expensive once you start adding it all together. Thanks in advance for any help! Sorry if this is in the wrong forum. I was torn between here and marketplace.

Mordenkainen's Tome of Foes is probably your best bet for next general, Charactermancer-specific 5e purchase: New Character Options.  Explore deeper options for elves, dwarves, halflings, gnomes and tieflings. Uncover rules for playing as one of the gith in their magnificent 5th edition debut. Supported by the Roll20 Charactermancer! It also has the benefit of adding: New Monsters.  Over 230 new monsters to drag & drop into your D&D 5e games. Each creature includes complete stats, one-click actions, beautiful tokens, and original artwork. Beyond that, you are moving into specific campaign enhancements: Acquisitions Inc., Midgard Heroes Handbook, etc.

Midgard Heroes adds loads of races, classes and spells, but it is 3rd party so beware. I've not had any issues so far though.

Thanks for the responses!  I'm so excited to give my players the best DnD experience possible.