The phrase "no lesser" is correct and can be used in written English.
It is typically used to emphasize that something is not inferior or less important than something else. Example: "She was no lesser than her famous sister, both equally talented in their own ways."
The men are more self-effacing, although — as the bullfighters' dance from "Don Quixote" showed — no lesser as technicians.
Sir Alex Ferguson to his devotees no lesser a cultural icon than his Macedonian namesake is the most successful football manager in English history.
The Swedish actress Alicia Vikander resembled no lesser than the Disney Princess Belle.
The actress Rooney Mara looked no lesser than the 'Greek Goddess' in her white Givenchy dress and heels by Stuart Weitzman while hitting the red carpet.
Those who are of the opinion that President Rohani merely represents a different side of the same coin expect Iran to continue to insist on playing a regional role of hegemony, the importance of which is no lesser than that of the other two crucial issues for the leaders of the regime in Tehran.
The first modification consists of using a biased probability density function for the first biased scattering that produces random scattering with an angle no lesser than 90 degrees away from the direction to the apparent position of the collecting optics.
Being transgender is no lesser than being cisgender, and you do not deserve other people's hatred for it.
Recognize that "different" is no lesser than "normal", and that it's okay if your child has special needs.
No lesser outcome will do.
Among the votaries are no lesser notables than Gabriel Garcia Marquez and William T. Vollmann.
No lesser a swimmer than Phelps has called her "a stud".
