I follow @wardrobe_oxygen for ideas on how certain outfits may look on my particular body shape - Allie may be older & a different size to me but she has fit issues I can relate to. This exact IG may not work for you but if you Google your particular set of body features & fit issues, you may find a similar blog (with an Instagram attached) for your personal outfit creation criteria.
I also follow @Panthere_InStyle for colour inspiration. Lena's lifestyle is far more formal & glamorous than mine, but I can still get behind her unique colour combinations.
I don't have many specific IG suggestions but I hope the guidelines above can help you find ones relevant to you. Just like with my colour inspo, you can identify which areas you like to focus on in the outfit creation process & use IG for those (e.g. if you're into textures, try searching for the #furryvest hashtag on Instagram to find people who like to build outfits based on texture). Sorry for my verbosity but you get the point, lol!