I've also get seborrheic dermatitis and the Aveeno wasn't good for me. It also did nothing to make my hair look or feel good.
I can use H&S fairly long term and Vosene and BS Ginger for a month or so at a time. Selenium Sulfide Selsun is my go to if I get a flare up and it generally clears it quickly, it used to be on prescription but now you have to buy it on Amazon. Betacap lotion helps if it's really bad.
I'm desperate to find something 'off the shelf' that doesn't scream "dry scalp" from the bottle and smell/feel medicated but spend a fortune on things that used to work or that'll work for a week then flare me. I might give this Garnier a bash for the price, I remember the conditioner being alright