Dave have been on a roll with Modern Life, Taskmaster and Go 8 Bit. Unspun I just can't get into though, it feels so dated compared to The Daily Mash which has started to find it's feet this series.
Dave's original content alone has made it one of the best multichannels out there. Although I'll have to disagree with you on Unspun - the second series really saw it start to flourish.
The Mash Report has arguably done so well for the BBC, particularly with the viral Rachel Parris segments and the now infamous Trump-Morgan caricature that infuriated Piers (and subsequently gave the Mash Report renewed attention). In fact, it's just been renewed for a third series later this year.
'Even by our standards, that was remarkably unproductive.' - Andrew Neil