Yes, they do look ridiculous, but these are very well tuned. There aren't any major dips or spikes that I can discern. They have enough bass to be musical, while clarity is still there. You might be surprised by these IMHO.
I would submit, my friend, that any of these that you have mentioned might be better in the category you are looking for. Not that they would sound "better" per se'; that will come down to the signature you are looking for. But as for refinements, technology moves so fast, even some of the cheaper IEMs nowadays are accomplishing feats that resemble TOTL or summit-fi stuff in many ways.
For instance, your Rai Solo uses a 9µm thickness diaphragm, where most nowadays are using 5µm or even 3µm thickness. This will make a DD almost planar(esc) in its ability to be fast and accurate in decay, etc... Also, let's not forget coatings, which refine this even further.
As an example, I would put the CCA CRA ($20 in USA) up against much higher priced single DD IEMs. Mind you, there is a TON of bass in these, but it is very tastefully done IMO (and you should know from our previous conversations, I am NOT a bass-head). But I would add to your (impossibly difficult to choose from) list the 7Hz Timeless (also boosted bass) planar, and iBasso IT-01x (a bit more analytical comparatively, but in a musical way; these might be the most similar to your Rai Solo). I'm afraid that I can't speak to the rest on your list because I have not heard them, but I have read good things on the IKKO so there IS that...
I have become very partial to the iBasso IEMs of late. I have the IT-07 (which are TOTL in sound, but not price @ $800), and IT-01, and IT-01s, but have heard the others (only sent the IT-01x back because they sound very similar to the IT-01s). All of these except the IT-01x and IT-07 have been discontinued, but you can still get them all if you dig into Amazon or Aliexpress. I got the IT-01s for $100 (were $200) new.
Just some food for thought. I hope I have not made it more difficult for you...