I have a cousin who is typical of being top-heavy and thick-legged. Every time he buys clothes, it is difficult to buy them, and he can't find suitable pants at all. It's really awkward to wear some tight pants. It looks really hot.
Once, under the introduction of a good friend, I took him to a Nike brand store and chose two sets of clothes and two pairs of loose pants. He doesn't look fat in them at all, but he feels very energetic. In addition, he went to the Adidas brand store to have a look. There are clothes suitable for him, so he bought several sets at once, and he was afraid that others would be out of stock when he went home.
So I think if you have thick legs, you can go to Adi and Nike. Maybe there are some clothes you need.