What's your favorite open-pollinated red bell pepper (for production and disease-resistance)?

I have only grown one, California Wonder. If I want green bells I pick them when they're green. If I want red I leave them on the plant until they turn red.

None/zilch/nada. Bell peppers do extremely poor, here.

In 2024, I may try early indoor starts, with a chilling time frame added, before outdoor transplanting.

In all my years of gardening, I had exactly one bell pepper plant that was productive, King Of The North. As an afterthought, I had this one transplant sitting around with no space to plant it. I stuck it between two tomato plants. With basically perfect weather for peppers that year, warm but not too hot during the day, and warm but not too cool during the night, getting shaded out by the tomato plants, it grew to about 6 feet and had a few dozen peppers on it. I don't believe that I could ever repeat those growing conditions.

For a conical OP red, Frank's is tops, for me.

Emerald Giant, Keystone Resistant, and Big Red have grown well for me.

Good question! Although I enjoy Lipstick and Ajvarski, I have to wonder how prolific they really are. I tried King of the North and Big Red this year, but found that they grew thick and diseased . The best for me seem to be Zupa as they are early and prolific.

Only grew them inside but nothing special so far can’t grow them outside either tried for years

The Lesya from Baker Creek.
It is so sweet & made for stuffing.
https://www.rareseeds.com/pepper-sweet-lesya

Ajvarski and Lesya were very productive for me this year. Of course, I had three plants of each, and I picked buckets of green peppers just before all the plants got frosted a couple weeks ago...but many of those are turning red on the table! I will have to look at my garden journal to figure out how many peppers I picked earlier in the season, but my impression is that these two produced loads of big, healthy peppers.

I grew these two because they did very well in previous years.