Dev studios / game companies that went from mediocre to good and beyond

[patronmacabre]

I'm going to get flak for this, but Naughty Dog.
Crash Bandicoot was kind of terrible. Jak and Daxter and Jak II were okay (though I absolutely adore Jak 3). Uncharted 1 was awful, but 2 and 3 were quite good. And then The Last of Us was a masterpiece and Uncharted 4 was very good.