I only tried a trap bar once. Eleiko brand. It started tilting and felt uncentered. It didn't have revolving handles, maybe that's why. I immediately gave it up although I usually love deadlift everything.
Best whole body movement that hits a lot of tissue: deficit deadlifts. Stand on something where your feet barely fit under the bar. Only problem is that it's so taxing and uncomfortable you tend to put it off, at least I do.