GC Processing for H1B candidates with I140 and I 485 approval

  1. I would like to know if I 140 is approved. Are there employers in US, who can file PERM labor right from Day 1 of joining after H1 transfer ?

  2. After GC I 485 approval, Are there employer willing to accept candidates, taking into consideration they will file for I-485J and also File H1 to be on safe side ?

Can anyone name such employers ?

Is it easier for employers to accept candidates in Option 2 ? or same hurdles as option 1.