I recently watched Guardian Chinese drama  ( I love how the plot is made as well, it was origanally BL but the main leads shows the love silently with gestures, words and eyessss) 
I also love Bromance (Taiwan drama) Veryyyy much ( I ship them in real life too lol) .
So, please please please, recommend dramas as the title described.
Strong does mean physically/mentally or fighter leads.
My recommendation is
1. Guardian ( Strong two main leads)
2. Bromance ( Matial artist male and female leads)
3. Stranger ( Smart male lead and strong female lead)
4. Children of Lesser God ( Smart male lead and strong female lead)
5. Voice ( Strong male lead and smart female lead )

The guardians (aka lookout)

Life on mars
Save me

I hope you can enjoy some of these ^^

Thank you so much @Akemi96 sweet heart <3 Wish you have a good day !

Lawless Attorney - Both leads are strong and smart.

 Ansuya:

Lawless Attorney - Both leads are strong and smart.

Thank you sweetie ~

Just Between Lovers

Healer 

Suspicious Partner

Mr Sunshine (currently airing)

Bromance is one of my all time favourites :)!

  • Sound of the Desert - both leads are strong fighters, both are intelligent, the FL successfully runs a business at one point, the ML is a successful general
  • The Princess Wei Young - both leads have strong character and are intelligent leaders / military strategists
  • Love O2O - both leads are intelligent in school and the work place and are top-ranked gamers
  • Legend of Fu Yao - both leads are strong fighters and intelligent (capable of putting together and successfully carrying out strategies / plots)