Which Countries Embassy/ Consulate out of the Schenghen is going to be most liberal with giving a longer term multiple entry TOURIST visa?

I've had Multiple Visas and have lived in the US 7+ years, visited Europe several times.
F1, H1, UK Tourist, Schenghen Tourist (Netherlands, France, Spain, Germany), Canada, Singapore, Malaysia, Thailand.

I'd like to apply to those who give the longest visa multiple entry as I am planning several months travel across Europe, then US & then back through Europe again.

PS: My family home is Bombay.