Hey! Fish oil is a really good place to start, especially for skin, coat, and general wellness. Totally get you on the picky-vitamin problem — my dog used to spit out every tablet no matter how well I hid it.
What helped was switching to softer, more treat-like supplements or liquids instead of hard pills. You can check out InnovetPet since they make oils and chews that a lot of dogs seem to accept more easily.
For basics, most people start with fish oil, a simple multivitamin, and something for joint support if the dog is active. Hopefully you find something your Husky Lab actually likes.
