i think you would like the feminine complex. a band from the 60s who were ahead of their time in some ways so it may satisfy the vintage craving of yours.
in terms of tone, you may also really enjoy newdad. the song blue in particular gives me immunity vibes in a way.
kate bollinger also blends the vintage and pensive pop worlds really well, so check her out if you haven't already. yards and gardens + who am i but someone are great tracks to start with.
mind shrine often have a silky 60s/70s thing going on
i feel like i remember her playing some wendy & bonnie on an nts set of hers once! i recommend the song five o clock in the morning!
hey there lonely boy by ruby and the romantics maybe isn't as clairo adjacent as the other recs, but a solid gold oldie for sure!