A couple more tips for you:
-- what's the focus (e.g. most desired use case) for your Eurorack? The draft above, I see drums, I see complex sequencing, I see sample manipulation, I see multi-voice harmony (Harmonaig), I see a digital wavetable oscillator (SWN, which may not be too much an advantage over software wavetable, depending on the use case). A big, expensive, well designed rack can do several things BUT smaller case, less experience makes it hard to do several things well. Hence I suggest you get more clear what role you most want your Eurorack to play, and focus on that first.
-- there are a couple "no regrets" modules I see in your build: IMO those include Pamela's NW, Stages, Quadra, Ochd, FX Aid XL. Those will give you clocking, a good range of CV, and a small but powerful FX unit. Of course you need something that makes a sound, just pick your preferred sound source. Then MOST of the other units I suggest you put in a "next / later" category after you log a good # of hours on your base rig.
-- I look at SWN and Harmonaig and think "hmm..." as in you may have much better options. I own SWN and it is one of my least favorite modules. I had high hopes for it, BUT just don't love it. It does not navigate arbitrarily in 3 dimensions -- much to my surprise, and confirmed by email with 4ms support; it does navigate in 2 dimensions, but instead of the 3rd dimension being freely controllable, you have to index through all waves end to end. So its not really x/y/z control, it is x/y/all control, if that makes sense. Also the included wavetables with SWN are not stellar for my taste; I would need to make my own wavetables. All told, if you're really interested in SWN, I suggest you download the free wavetable editor software for SWN and play around in that, it will give you a very good idea of the kinds of sounds you can get. SWN is also not cheap. SO there's a ton of other very interesting OSCs you could get instead (or before) such as DPO, Cs-L, FSS OSC2, etc. Harmonaig I've looked at, it is not for me, AND since it drives 4 voices, I can't personally make sense of having it in a small rack.
-- last, I do think it's important to have instruments that are inspiring and deep. If we don't think XYZ instrument is cool, fascinating, beautiful, challenging, etc., we won't come back to it again and again, won't put in hours to learn it. So as you edit what your rack plan is, consider what is the inspiring direction for it to go, do have a couple of those key modules included, and get those enough support modules (utilities etc.) so they can really "shine".
Modular is super deep, relatively expensive, and IMO there's probably no way to get into it without making some mistakes, wasting some $s and time, and going down some rabbit holes. Asking questions on MG, and taking the feedback into consideration, is a great way make the pathway a bit smoother. Jim, Lugia and others here give really helpful pointers. If, after some more thought, you put up a 2nd version rack, I'm sure you'll get some feedback to help assess if your design has improved or not.
Cheers and good luck!