InterGalacticClusterFuckIDK about the rest, but the TFZ Exclusive 5 are great v-shaped sounding IEMs. Not only the have one of the best bass responses, but also clear sound from bottom to top end, decent soundstage, TOTL build quality & comfort... For under $80 I doubt you can get anything much better (in this sound signature), really. And I have 20-30 chi-fi IEMs, from $3 KZs to $100+ Dunu Titan 1, I think I can say that without being too wrong. Of course, sound is subjective, and what I find great others might find poor.
IEMagnetWhich TFZ u have? T2 Pro, worse than MH755? I guess your hearing is different than mine, at the end of the day what I consider "better" might be "worse" for you, so maybe we're both right. IMHO, Tin Audio T2 (the original, not the newest Pro version) with foam tips are one of the best balanced sound IEM, and TFZ Exclusive 5 (not Series 5) are my favorite bass cannons (and one of the best v-shape sound IEM).