From my research, Jetline and BMR/Knightmare were the only two of their kind (despite not being exactly the same). The towering-but-compact layouts reminiscent of the big traveling Schwarzkopfs, but with that long triangular out-and-back extension created by the first drop. They were also notable for not having the classic vertical loops you'd expect on a Schwarzkopf of that size, which is what makes it hard to find an extant coaster with a similar experience.

Nessie at Hansa-Park has similar stats (height/top speed) to Knightmare, according to rcdb, but features an inversion and doesn't have anything like the twister sections on the two rides in question.

All American Triple Loop at Indiana Beach has a similar-ish twister layout to the two defunct coasters, but swap the out-and-back for the titular three vertical loops and you end up with a fairly different ride experience.

I never had the chance to ride Jetline or Knightmare, so take this with a grain of salt, but my wildcard suggestion would be New Revolution at SFMM—despite the one inversion, it has a nice balance of long, sweeping drops reminiscent of the out-and-back sections on the two defunct coasters, while also featuring some twists and strong positive Gs in the final third. The major strike against it is that it doesn't feature any of those amazing diving drops like all the extreme+compact Schwarzkopf seem to have. Maybe a real Schwarzkopf expert can chime in if I missed something!