"the most hardworking" is a correct and usable phrase in written English.
This phrase is often used to compare different people or things and show which one works the hardest. For example, "Out of all the employees, she is the most hardworking."
"Niggers is the most hardworking people in the world.
"And I think Ryan is the most hardworking person ever.
Considered the most hardworking of the four, Portalis wrote several of the most important articles of the code, notably those on marriage and succession to property.
The most hardworking people were Russian prisoners of war; they lived longer than the other guys, about six to seven weeks".
The graph below shows the relationship between productivity (GDP per hour worked) and annual working hours:The Greeks are some of the most hardworking in the OECD, putting in over 2,000 hours a year on average.
Recognized as one of the most hardworking journalists in town, always ready to help his colleagues with informed opinions or telling anecdotes, An gave information in order to get it.
Meritocracy is the principle that the best, most hardworking and able people should be rewarded and the worst, laziest and least able should be overlooked.
We're young, agile, and ambitious, with the smartest, most hardworking team I have ever come across.
During the nineteen-thirties, John Steinbeck, Jack London, and James Agee all turned their attentions to the country's most hardworking and most desperate people.
That after all my work, my effort — I am most hardworking in the lab — our supervisor exploits my good nature.
Like most hardworking fathers, the best advice is usually found in actions rather than words.
