i have two daughters (3.5 and 9 months) and have never owned a pram so have used slings throughout pregnancies, post both elcs.
i used moby wraps initially. in black
then progressed to girasol woven in grey stripes (not fond of juggler chic or chintzy hippy style) currently using this alit for back carries
own also a calin bleu lightweight wrap in blue as we used to live in singapore and it was too hot for thick wovens
my husband favours ergos (black), and i like it for feeding to sleep as you can readjust easily once the baby is sleeping.
we also used a boba carrier when eldest was 2-3 as it's long in the body.
i know what you mean, so many carriers are unstylish, but i love my clothes and fashion and although i make concessions (wear flats, don't use my chanel handbags now) to slingwearing i found blacks, greys in wraps and they don't look unfashionable as such.
babybjorns, though widely available, aren't good.