Too Much Coffee

So can anyone recommend a good coffee shop in South Ken? There's LOADS to choose from, but I've yet to find anything that comes close to Flat White/Milk Bar/Sacred/Monmouth quality.

Raison D'Etre on Bute street used to be good, but was very ropy last time I went in (I think it's changed hands). Tend to use Greenfields now as its a) handy to the museums, b) an independent, not part of a chain. It's OK, but nothing special.

There's almost too much choice..!

Thank y'all...