In today's live sew Kay asked about oversized shirt patterns. I have pinned quite a few patterns for oversize shirts on Pinterest. Here they are:
Merchant and Mills Ellsworth--has a placket that could be extended
Tropical Research Minimalist Shirt (FYI his is an etsy seller but has good reviews)
Archie top This is cropped but could be lengthened.
The only ones I've made are M&M Ellsworth ("ludicrously capacious" to borrow from Succession) and the Jenna shirt, which I've almost finished and am really liking.