“So far as I know, he was the last Rabbi to hold that distinction.”
Rav Belsky was respected by both worlds (he headed up OU kashrus I believe). Rav Ovadia Yosef was respected by both worlds. I think Rav Heinneman of the Star-K (still living) has maintained respect in both worlds, albeit not without some controversy. If people want respect in both worlds, the formula seems to be:
1) Be very frum/yeshivish in your own life.
2) Be willing to pasken very meikel and stick by your guns when you know it’s right.