I posted on your visitor message, but for the sake of other people who might be interested, I'll post what use here.
I use a number of shampoos, all of them really nice. I use IVSanBenard Black Passion (with Argan oil) and Fruit of the Groomer--Passion Fruit, and their PEK conditioner is awesome. It's very expensive, but I wait for a sale, and it lasts a long time. They have a long lasting scent. I also use Isle of Dogs #10 shampoo and their #51 heavy conditioner. It is great for the skin and has a very nice primrose vanilla cream smell. It's a little heavy for me because of have trouble with perfumes, but it's still very nice and has the same smell as their great de tangling spray.
https://www.iodogs.com/p-269-no-10-e...l-shampoo.aspx Chris Christensen also has nice shampoos, and I use Spectrum 10. Their trial size kits are great.
https://www.iodogs.com/p-269-no-10-e...l-shampoo.aspx I have used Jerob Mink Oil and Ccoa Butter shampoo for over 20 years, and I still use it as a pre-wash, but I have been using the Isle of Dogs and IVSanBbernard mostly. Katie has very thick, silky hair, but it makes a difference when I use good shampoos and conditioners on her. Good luck finding a shampoo you love