I agree with you, Boss and me indeed set the bar too high for a office Rom-Com. Since then, I've also been searching for something that will be comparable to Boss and Me.
These my not be comparable to boss and me, but must Try:
1. Refresh Man
2. strong girl bong soon (*)
3. Time teaches me to heal
4. About is love
5. What's wrong with secretary kim (*)
6. Protect the boss
7. introverted boss/my shy boss
8. Suspicious partner
9. jealousy incarnate
10. clean for now with passion
11. jugglers
12. oh my lady (*)
13. well intended love
14. the fox's summer / fox fall in love (*)
I'll try to think of the other dram's that i've watched. I marked (*) those that i enjoyed most.