What Deadeye and Cloud983 said is it.
I have built numbers of OUTEMU Silent Sky. All you need are the stems. You put them in Cherry housings, or TTC Gold Brown V2, or Aliaz housings, Huano Banana, Boba, or even leftover Kailh Polia housings.
As said, the OUTEMU Silent Sky was explicitly designed to be a silent Ergo Clear, and the switch you are using, Dragonfruit, was also designed to mimic an Ergo Clear. So this is the closest that you will get.
OUTEMU Silent Sky stems were designed for 15-16mm 62 or 68 G springs, although you can get away with big 55 G springs and 14mm 60 G springs. Honestly, I think 14mm 62 G - 15mm 63.5 G is the ideal range for these, especially in Cherry housings.
These are easy to build. I only build a few switch types. You just take apart the switch you are putting them into, replacing the stem [and maybe spring] with the Silent Sky. You can lube with 3204, and pretty carelessly as well.
Two of the switches you mentioned, Penguin and Taro Ball, are all variants of Durock Medium Tactile, and so is Dragonfruit. So they are all recolours of Durock Medium Tactile, sometimes with a different spring.
Hence, going to any of those switches would be just as loud. Same as Zealio, Neavy, and Pewter. They are good switches, but are not silenced.
The OUTEMU Silent Sky was basically designed to be a kind of “Silent Naevy,” so that’s why you want it.
You also mentioned silent T1. Those are pretty decent, they come in several variants. But they are more tactile than the Dragonfruit. That’s why I recommend 62 G (14mm) OUTEMU Silent Sky, which should be similar in intensity to the Dragonfruit.
You can actually drop the Silent Sky stems right into the Dragonfruit housings [since I know that this is possible with the Penguin switches], but why ruin your Dragonfruit switches?
BTW it helps to have a board that muffles silent switches: I’ve found the Archon AK89 and some builds of the IKKI68 Aurora to do this. In fact, I have Silent Sky in my Aurora right now. (Incidentally, if Zeal ever made a Zilent V1 redux, that would be perfect for you.
You can buy the OUTEMU Silent Sky stems from Gazzew. They discontinued most of the other parts, but I was able to buy stems last year. I recommend trying them with the following springs: Spirit (regular linear stainless) 55, 62, 63.5 / TX [14mm] 60, 62, 65 for spacebar / OUTEMU 52 and 62. (52 G can be used in smooth, low-tactility housings).
Aliaz is much less-tactile than OUTEMU Silent Sky, believe me. Aliaz is basically a silent Gateron Brown, Silent Sky is a silent Ergo Clear. But Aliaz can make a good housing for Silent Sky: just lube the stem, use OUTEMU 52 G, maybe.