Counters as Diana and alternative champs?

Hello, I am a Diana main and have probably a 60 or 70 percent winrate on her. I find that my biggest problem as her is that i don't know my matchups well enough and that i don't have alternative champs in my pool that fit my playstyle and work well against champs Diana does badly against. So i am looking for champ recommendations as well as alternative champs i could play against bad matchups for Diana that fit my playstyle. I am a midlane main first, jg main second, my playstyle is champions with mobility that has to be a dash or better and they also need to have relatively good burst (able to kill the ad carry with full combo). The main matchup i struggle with as Diana midlane is Zed, i know diana counters him but its still a matchup i have problems with for some reason. So i would like recommendations for a champion that does well enough against the matchups that Diana falls short on that fit my playstyle well enough and that are mid or jg (preferably mid as that is the position i have a bigger problem with matchups).

Thank you! Sincerely, MangoTwerk