Welcome to YT. I like using Isle of Dogs Shampoo Numbers 10 or 12 or IV SanBernard Black Passion and Passion Fruit shampoos. I buy the liter sizes because they are much more cost effective. iV San Bernard also makes a great conditioner called PEK. The conditioner I use from Isle of Dogs is #51. All of these products are conditioning to the skin and can be used once a week.
https://www.iodogs.com/p-272-no-12-t...l-shampoo.aspx https://www.iodogs.com/images/docume...L_12.31.14.pdf 
Pet Shampoos : Amazon.com: Isle of Dogs Coature... https://www.iodogs.com/p-262-no-51-h...nditioner.aspx IV SAN BERNARD PEK CONDITIONER SAMPLE MULTI-PACK 3 COAT TYPES