I personally think GOOGL has the highest upside so I put tha...

I personally think GOOGL has the highest upside so I put that first. Between MSFT and AAPL it comes down to preference. I think MSFT is more diversified and a safer hold, but I think AAPL is better at innovating and 'creating' their own markets, so I think they possibly have more upside and are therefore marginally better than MSFT.

Personally I rank them GOOGL > AAPL >= MSFT.

I put AMZN between GOOGL and AAPL.