Any non HE version is a good sudser. Just remember that you do not need billowing suds to get clean clothes. Too many can hinder washing and rinsing performace greatly.
WK78
Not sure if their powder is more sudsy than liquid, but I occasionally use liquid on really greasy/oily items and it suds up like crazy.[this post was last edited: 4/16/2013-19:30]
Good old powdered Tide will bring the froth and I love it! I insist that my Frigidaires operate with a layer of suds on top, you can see the dirt floating on top of those suds and it whirls it all out and down the drain.