I was thinking of something like this:
That looks excessive for just a node, so it should work quite well

From what I've seen on Lowendtalk, those newer "Slices" have better performance than mine. It says Dedicated cores, and they say they don't do overprovisioning, but they also said that with mine so I can't be sure.
Note: I haven't installed my own block explorer on this server. I don't know how demanding that is.