Shrub 1 looks like Ilex crenata, Japanese Holly. I'm a much better identifier than I am a gardener, but my impression is that these hollies are pretty tough; if you sheared it back it might make a regrowth and look better. On the other hand, if you pull it out you're not losing anything rare. What you see is what you'll get; the flowers are inconspicuous and the fruits are little black berries, not showy. A healthy Japanese holly is a pretty plant, though. Shrub 2 is a Leucothoe, probably Leucothoea fontanesiana, it will have drooping clusters of white flowers in the spring. My guess would be that the black spots are just winter damage and will go away. Shrub 3 is Wintercreeper, Euonymus fortunei. This thing is practically a weed (it is a weed in a lot of areas.) There are loads of different varieties of different colors, etc. If the old growth is in a bad place prune it, if it isn't leave it; this plant probably won't care what you do to it. WW

Viburnum - I'm afraid I can't tell you which one but maybe V carlesii another winter bloomer like your Mahonia.

Sorbaria sorbifolia I believe.

A rambler rose - I can't name the variety but it could be Rambling Rosie.