For example: Nidalee mid/top. Kha’Zix mid. Sejuani top or support. Amumu top or support. Zac top. Graves ADC. Xin Zhao top. And so on.
Actually, Riot often does the opposite: Whenever a jungler is going in other positions, they tend to nerf it. They did it with Nocturne for example.
Because laners are usually balanced around a specific trade pattern, strengths and weaknesses, counters, etc. Junglers, on the other hand, don’t offer much interaction when played in a lane. Nocturne is just gonna run at you and autoattack you to death, just like Xin Zhao, Graves, Jarvan, Briar, etc