Alas, I can't think any major group released in the last 10 years that has anything like New Jeans. We are seeing one a very few cases of a group that is not hyped like "The next 2NE1/SNSD/Sistar/f(x)" but a group who stand by their own feet. This is quite remarkable by itself
I generally on the side girlgroups debut hype is mostly mindless as people are stanning for photoshoots, but in few days New Jeans will have released more music than Ive I.e. it's been really being sold as a MUSIC GROUP, not a bunch of models releasing singles from time to time (cof cof Blackpink strategy). This is just the cherry on top.
first, groups like stayc, ive and le sserafim weren't dubbed as the next *blank* group either. partly because their agencies don't have other famous gg acts to compare them to (starship has sistar but their concepts are nothing alike so that doesn't count), partly because they were different on their own too. so "standing by their own feet" isn't as revolutionary as it sounds.
second, every group is sold as a music group, if they weren't they wouldn't be kpop. even blackpink, believe it or not. blinks can correct me if i'm wrong but blackpink got their first brand deals 2+ years into their career so they weren't formed with full-time models/part-time singers in mind, that's just how the events turned out for them.
third, many other groups have been releasing pre-debut content, be it original music or dance covers or singing covers or variety shows etc. hence newjeans aren't the first nor will be the last to do so. plus, their songs, as i said, they're very good, but not something that kpop hasn't seen before. definitely bops but not bops enough to make you go "damn, that's something new". (that's my personal taste though, feel free to not agree with me)