Voicings

A voicing is the specific arrangement of notes in the chord stack.

An E- chord might be voiced as:
E G B
E B G
B G E
E G
E B
E G B G
E G B D
E G D Fs, or even
Fs G B D

Yup! You don't always have to use notes exclusive to the triad.
Triads are tools to build arithmetic, they are not necessary musical implementations.

Of course, dense harmonies and rootless voicings might not always be the best choice.
That depends the on context of the music being played.

But neither are chord symbols obligations that E- means you must always play E G B.

There is no right or wrong. All answers are correct - in context.
The only 'rule' in music is: Does it sound good?