Not sure about influencers, because they tend to annoy me. Ones I've followed for years are Dominic Munnelly
https://www.instagram.com/dominicmunnelly/?hl=en and his wife/business partner Gráinne
https://www.instagram.com/grainnehealthcoach/?hl=en. He's an actual trainer, and has been for years and years. He actually knows what he's doing - I did a session with him once when I lived in Dublin and he's lovely and really good. Gráinne does the food side mostly. Nothing faddy or keto, just tasty food using good ingredients. I was given one of the flapjacks after my training session! I'd rather not follow someone who's unqualified, doesn't train clients in person (and might have little to no experience) and is mostly about selfies and the 'gram.