We give our son DHA (250mg), a probiotic, ADEK multi, Tumeric, inhaled GSH (200mg), and occasionally oral GSH for gut inflammation.
We've tried Hawthorn Berry (Crateagus) but it didn't do anything for him, though some have seen dramatic reduction in enzymes (especially with delta F508).
For colds/flu support as needed, we use Herbal Expec (just Guifenesen plus herbs) as decongestant, UMCKA for sore throat/upper resp issues, and we keep Oscillococcinum on hand for flu exposure (along with a perscription for Tamiflu).
There are many imbalances linked to depression; yeast overgrowth, undiagnosed food allergy (or medicine allergy), fatty acid imbalance to name a few. A intergrative, naturopathic or homeopathic MD/DO could help determine your unique deficiencies through testing and many will test for allergies as well. Many of the supplements you mentioned will work to rebalance the body, but sometimes more needs to be done to jump start the healing process.
Just some thoughts,