The dual (tandem) rotor saga started right after WWII, almost every major aircraft manufacturer had a contender, even Yak in Russia.
In the US - USAF and USN put dual (tandem) rotor aircraft in use most commonly with the Flying Banana and Bell HSL.
Bell HSL (1953)
Piasecki H-21 (developed 1949)
Earlier version of the Chinook was the CH-46 Sea Knight that saw use after the Flying Banana. These dual rotor helis (CH46, CH47) are extremely versatile platforms, needing no tail rotor, and can be stored on aircraft carriers with rotor blades folded. CH-47's have wide usage. Bangladesh and Pakistan do not have any, though the Indian Air Force has them now.
en.wikipedia.org
CH-46 (early 1970s with colorful USN markings)
This is a slightly different SAR variant - the HH-46.
Japan Ground Self-Defense Force also used it at one time, along with the CH-47 currently.
Please see above. I wonder if Pakistan AF has sought purchase of CH-46 or CH-47's at any time?
Compared to the MI-17 lift capability of 4 tons, the CH-47's can lift 10.5 tons (54 troops or 155mm Howitzers to points of conflict).