Old school hip hop head right here to give you some good recs.
Plus i have owned Dragon 2.0 and Seahf 150 like you.
Cygnus is great but very little bass impact/depth!!!! Keep this in mind.
Asura 2.0 also great, has more treble extension but you may find the vocals and bass a little rough.
Qian39 - about $10, awesome awesome sound so much like Seahf 150 but warmer.
Monk Plus - more balanced, less warm/fun than Qian39
TY Hi-Z 650 - so so good but iPhone will not drive them to their best by itself. Not sure if i can recommend to someone just using weaker smartphone without amp.
The TY 650 is great but even the Monk Plus sounds ever so slightly lacking on iPhone IMO, at least compared to some other phones, the Qian39 for a cheap one is really really great though. If the lack of deep deep bass of the Cygnus does not bother you, the rest of it is great. The Asura 2.0 is a good choice if you want more treble and bass extension than the Cygnus.
I have not heard the Moondrop VX Pro but it sounds like it is very neutral, so my thoughts is it will be similar sounds to TY 650 but less bass probably.
I will post my thoughts about Green Ting when it is delivered, hoping it's good for old school hip hop too.