"foremost strength" is a correct and usable phrase in written English.
You can use it to refer to a person's or group's greatest asset. For example, "The team's foremost strength is their ability to work together collaboratively."
His foremost strength was his perseverance in the face of adversity.
Since ants were the foremost strength of an ACO algorithm, guiding the ants in the correct directions was a critical requirement for high-quality solutions.
The foremost strength of the Amsterdam Wrist Rules is that it is one of the few clinical decision rules that have been externally validated.
The foremost strength of this study is the analysis methodology itself, since CEA accounts not only for effectiveness and costs, but includes also information on relapses, hospitalizations, and adverse events.
Protagonist Danny Kelly – a name that nods both to outlaw Ned Kelly as well as Roald Dahl's champion of the world – is a swimmer first and foremost; his strength and power in the pool are the reason he has gained a scholarship to "Cunts Collegee", as it is known throughout the book.
First and foremost, America's strength depends on a strong economy, where our middle class is growing and everyone who works hard has a chance to get ahead.
First and foremost, we have used strength data from military conscription testing.
Integrity is a core strength that is first and foremost important to any Military member or Veteran.
Writer-director Nancy Meyers has now surely established herself as the world's foremost purveyor of crack-cocaine-strength gastro-lifestyle fantasy porn to the menopausal classes.
I agree with what you said in the early segment that Democrats have to go after McCain's strengths first and foremost.
According to Variety Brian Lowry, Kevin Spaceyy's showy performance as an unscrupulous politician" is foremost among the show's strengths, but the show's weakness is the "failure to present its scheming protagonist with equally matched foes".
