Hey there :-)
It seems that you have missed probably the most important, or at least one of the most important projects on Steemit which is Steemcleaners :-)
It was funded by witnesses @anyx (also creator of cheetah bot) and @patrice (also creator of spaminator).
There are also 3 other important witnesses in the Steemcleaners team: @guiltyparties @pjau and @pfunk