Deviled Eggs Search

I am on the search to make the perfect deviled egg this month. I have tried it a few times but haven't gotten to the perfect mix. First ones had way to much flavor, second ones were to salty, third were boring, and the last ones one the left had too much onion. I am thinking about trying some with jalapenos. I know Easter is still kinda far away, but this year I'm going to get it right. Let me know if you have any tips.