How can I change jobs while on H-1B with a pending I-765 and I-485?

I would be surprised if a change of employer would make a difference. H-1B is dual intent, allowing the green card process to proceed with the H-1B remaining in place. You may need to amend your I-485 with updated employment information. Eventually, you''ll use your EAD to be employed and then the green card itself.

Until your I-765 is approved, you cannot work for the new employer; however, you can report, if currently employed, on an H-1B, and then transfer as soon as the new H-1B visa petition and extension of stay is filed.

I assume your new employer would file an I-129 for you. Your H1-B job has no impact on your I-485, as long as you continue to maintain your NIV, you should be OK. However, I advise that you discuss with your attorney who can properly gather facts and advise you.

You are entitled to use your EAD to change jobs but safest is to maintain the non-immigrant status as well and ask the employer to file for an H-1B transfer.

In terms of maintaining H-1B status, a new petition from a new qualifying H-1B employer would need to be filed.