You are not paying attention
If straight out departure, there is no "safe return altitude". In your question, you didn't specify 5,000 feet remaining at OEI. If you take-off into the wind, if there is one, you can't "turn into the wind" with any Bank after OEI. You acknowledge that there is no glide distance as great or greater than distance from runway at OEI, yet you say you've practiced it many times. I hope you are at altitude when practicing this, not near the airfield, reading the Altimeter correctly, and solo.
AF