the rest of us

“He has more money than the rest of us put together.”
Is this sentence OK?
What is its meaning?

Yes, it’s OK.

He has more money than all the other people added together.

  1. He has more money than all the other people added together.
  2. He has more money than all other people added together.
    What is the difference in meaning between the two sentences?

There’s no difference in meaning, but the expectation is that tghe article would be used there.