Culottes are surprisingly good for me (pear shaped 10-12), I think because the wide leg distracts from my thighs, but my relatively slim ankles are still visible. I bought a navy pair with front slits from Zara for £5.99 in the sale, they were great until it started to get cooler.
Then found a grey pair in Other Stories made from quite heavy cotton jersey, and they are so cosy to wear. I wear them with flats/chelsea boots and I think that looks alright, the structure makes them more smart than slobby. Can't find them online but they were in the sale too.
I'd quite like a wool pair, possibly pinstripe charcoal, for work...