all your rear tyre has to do is stop you.. so you want something that is designed for that job. Minion DHR2 is the boss in that category IMHO
The front tyre is for control and steering. In mud i go for a Michelin wild mud. It is outstanding in wet and muddy conditions without being horrible to live with. I’ve ran one in 28c heat on shale and it was still decent (flat white – caberston – tweed valley)
Different trail and ground types require different solutions. I tend to ride steep technical rocky, mucky, Scottish slop..