Any scent free will work in a HE machine. HE machines require less soap and if you are a heavy handed, more is better when it comes to soap in a HE machine it may not be able to rise all residue out. Use any soap you want just use the recommended amount or actually a little less than recommended amount.
I use Code Blue personally but Dead Down Wind and HS is good also.
Dry on low without a scented dryer sheet or hang outside to dry. Put in Totes or HS scent free bags and good to go!
FYI, same goes for HE dish washers, less is more.