Two quick questions:
Darren, standing over seven feet tall, is one of the school's best physics students.
––> this sentence is nonsense: there is no plausible relationship between darren's height and his knowledge of physics.
Darren, who stands over seven feet tall, is one of the school's best physics students
or
Darren, who is standing over seven feet tall, is one of the school's best physics students
Further,
The cat, who is SLEEPING on the rug, is named "Sue.
-->now correct, right Ron?
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Darren, standing over seven feet tall, is one of the school's best basketball players.
Standing over seven feet tall, Darren is one of the school's best basketball players
Darren is one of the school's best basketball players, standing over seven feet tall
All three are correct and have exactly same meaning, right Ron?