If you are after something wide ish and around 60mm, I would check out the Powell Bombers, they're 60mm, decently wide and 85a. Not quite as soft as the OJs but either one is more than smooth enough for most rough terrain. I guess if your commute to work is next level shit, 78a vs 85a might be a noticeable difference.
The nice thing about them is they don't feel gummy on decent ground, and very surprisingly, they slide really good. I have no problem doing full on powerslides down hills without too much more effort than say on a wider spitfire classic, although it feels and sounds very different and you can't hold it for quite as long. In my opinion, it's always nice to have the option to be able to slide in case you ever need it.
I've tried my friends super juices, powell g-slides and the bombers. The bombers are my favourite by far and are nicer for slides than the g-slides, which have a chalky, muted slide. Recently got some 56mm keyframes because I wanted something with a smaller profile for my zip zinger, but really miss the ability to slide like on the bombers. That being said, if you want the softest possible wheel, I'd just get whatever you can find that's got the lowest durometer.