Thunder and Lightning
I do like "Mars Midget" but I was a bit wary of trying the variegated "Thunder and Lightning" as in the nurseries it never seemed to have many blooms. And last year when I planted the two of them they didnt really do much. And so I have been pleasantly surprised at their floriferousness thus far in their second year. As well they are quite compact. There are a few leaves here and there that seem to revert to green but not many so far.
Here is a picture I took today of one of them: