Nam is the most skillful in my class. (This is the most common way to rephrase the sentence to show Nam's superiority.)
* The blue house isn't as beautiful as the white house. (This phrasing uses a comparative and "as" to compare the beauty of the two houses.)
* No other house on this street is as modern as this one. (This uses "no other" and "as" to show this house is the most modern.)
Here are some alternative phrasings you can use depending on the nuance you want to convey:
* Sentence 1:
* Nam is the best in my class (in terms of skills).
* Everyone else in my class is less skillful than Nam.
* Sentence 2:
* The white house stands out for its beauty compared to the blue house.
* The blue house pales in comparison to the beauty of the white house.
* Sentence 3:
* This house is unmatched in its modernity on this street.
* This house is in a league of its own when it comes to modernity on this street.