"Yes, and Harper missed EVERY sign". 

Every Politician missed every sign, and had Harper stood up and said "We are going into a major recession" You would criticize him  for driving us into one.

It was obvious from at least 2005 that the bubble was on the verge of bursting, and yet Paul Martin didn't mention it in his campaign once, but campaigned on even more stimulus to inflate our part of the bubble further.

The Coalition was formed to increase deficit spending not introduce it - bit of a difference. Harper already knew that deficits were inevitable, it just became a question of how big.

"Harper was able to use "Stimulus" like a slush fund with quarterly reports to Parliament morphed into Action Plan advertisements."

Partly true - that is the nature of deficit spending everywhere - the "Deadhand" of Government miss allocating resources.  

No real indication Harper was better or worse than anyone else at that.