I propose to add Onramper for fiat onramping. Onramper is an aggregator of fiat onramps, where they have all major onramps in a single widget/UI/integration.
Check it out - buy.onramper.dev
LooksRare just added MoonPay, Opensea also just have MoonPay.
Onramper has MoonPay plus 12 others, all in a single widget, (Stripe, BinanceConnect, Transak, Mercuryo, all of them…)it would blow them out of the water.