To make an accurate list I'd probably need a top 50.
But here are 2 bonus OPs from the top of my head
Gokukoku no Brynhildr OP
https://www.youtube.com/watch?v=kQmzD5CT0ec
Denpa Onna OP
https://www.youtube.com/watch?v=1U2i6wkmvEo
If you demand respect or gratitude for your volunteer work, you're doing volunteering wrong.