The hottest ones yes, I’d probably find looking at them too hot

But on the other end of the spectrum there’s mild ones like poblanos and Anaheims (both are usually ranked relatively close to pepperoncinis and they’re ranked a fair amount below the mildest jalapeños, which for the record I assume aren’t that spicy either. Jalapenos have a range spice wise so the jalapeños you’ve tried are probably spicier enough than the mildest jalapeño's, just a guess). So while I don’t know your spice tolerance exactly, based on the fact that you like pepperoncini I think you’d be able to multiple of the less spicy peppers without too much discomfort, like the ones I mentioned.