"charming of" is not correct and usable in written English.
To use the word charming, it should be followed by a noun or pronoun (e.g. "the charming of her smile").
It was charming, of course.
There stood the most charming of theaters.
IT IS not, despite the odd Victorian gem, the most charming of English cities.
The 1996 Double was perhaps the most charming of all Ferguson's triumphs at United.
The logo is called Adam Bomb, and it's probably the most recognizable and most charming of all street wear icons.
Next, to the island of Jeju, in South Korea, for kimchi, getting stuck in and more charming of the locals.
At any rate, that's the concept informing the trio's "Bootylicious" video, one of the more charming of recent years.
Most charming of all is the Verschuur oil studies of spaniels at play at the Noortman booth.
Tyler Duncan sang Friendly with a strong, clear tenor, and Andriana Chuchman proved suitably charming of voice and mien as Flora.
The Clock remains one of the most charming of Hollywood's World War II romances and one of Garland's most enduring dramatic vehicles.
