Looking on the internet deeply has found these results:

who are is the most popular phrase on the web.

they 1554,000,000 results on the web	who are 1882,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
The singular they is the use of this pronoun as a gender neutral singular rather than as a plural pronoun. The correctness of this usage is disputed. The Oxford ... Another solution is to change the antecedent pronoun or noun from singular to plural so that the plural pronouns they, their, and them can be used: All who ... They (also known as Wes Craven Presents: They) is a 2002 American supernatural horror thriller film directed by Robert Harmon. The plot centers on a group of ... Director Robert Harmon and Laura Regan Still of Laura Regan in They (2002) Still of Marc Blucas and Laura Regan in They (2002) Still of Laura Regan in They ...	Call people who are in taxis. Let us learn who are our allies and who are our enemies. People who are better off pay for those who are worse off. To them who are here in the room, to those who are watching on television, your government failed you. 500 million people who are extraordinarily good at something. I'm going with the guys who are getting creamed. Those who are converted stay that way. Educating young consumers who are particularly active online is crucial.

they

1554,000,000 results on the web

who are

1882,000,000 results on the web

More popular!

The singular they is the use of this pronoun as a gender
neutral singular rather than as a plural pronoun. The correctness of this usage is disputed. The Oxford ...
Another solution is to change the antecedent pronoun or noun from singular to plural so that the plural pronouns they, their, and them can be used: All who ...
They (also known as Wes Craven Presents: They) is a 2002 American supernatural horror thriller film directed by Robert Harmon. The plot centers on a group of ...
Director Robert Harmon and Laura Regan Still of Laura Regan in They (2002) Still of Marc Blucas and Laura Regan in They (2002) Still of Laura Regan in They ...

Call people who are in taxis.
Let us learn who are our allies and who are our enemies.
People who are better off pay for those who are worse off.
To them who are here in the room, to those who are watching on television, your government failed you.
500 million people who are extraordinarily good at something.
I'm going with the guys who are getting creamed.
Those who are converted stay that way.
Educating young consumers who are particularly active online is crucial.