Dance warm-up shortards - I think these are a really good summer option for a boiler suit - they're meant to be layered and you can wear all kinds of shoes! I haven't seen them on fashion websites (I guess they're somewhere between a romper and a jumpsuit?) so I've included some from a dance site (hashtag dancecore). I love this option for curvy bodies as well because of the proportions.
{image from grishkoshop.com}