I'm looking for a "non kyc on ramp" which is/looks legit in the eyes of the tradfi banking world making it possible to use credit cards/sepa transfers to them *without* being asked 10+ questions as of "Why are you doing this transfer to X?".
-snip-
I'm afraid I'm going to have to disappoint you here. Personally, I would no longer be aware of any way of putting
larger amounts into circulation without KYC.
The emphasis here is on "larger amounts". I don't know where you live, but there are bitcoin ATMs in Germany, for example, where you can buy BTC for cash without KYC up to a limit of around 500€. You can then use these BTC to transfer them to exchanges or to buy vouchers, prepaid cards and so on.
However, when converting the cryptos to FIAT and cashing them out, you will probably be confronted with similar questions again. Therefore, you should keep the deposit receipts of the ATMs very well.