I have a lot :) but if I were to narrow down to my top 5 strong and admirable female leads then they would be:
1. Kahoko from Kahogo No Kahoko - The female lead was VERY dependent on her parents and had relied on them for all her life but she starts to become an independent young lady after meeting a hardworking guy.
2. Luo Zi Jun from The First Half of my Life - This is a story of a rich house wife whose life completely changed after her husband decides to divorce her. The way she faces all the problems that come across her way head on and picks herself up after hitting rock-bottom is simply admirable. This is probably one of my all time favourite dramas.
3. Junko from Hajimete Koi Wo Shita Hi Ni Yomu Hanashi - The female lead lead here rediscovers herself and starts to enjoy her choice of career after meeting a young man.
4. Wei Ying Luo from The Yanxi Palace - The female lead here is real badass and strong in every way possible. Plus, an admirable trait about her is that she doesn't take crap from anyone and stays true to herself always.
5. Yoon Ji So from When My Love Blooms (Currently airing) - I can't say much about this one as yet since its still airing but within the first 4 episodes, one can see how the FL here isn't a weakling and always stands up herself even if someone is trying to pull her down.
I tried my level best to keep the explanations as spoiler free as I can :D