Ds1 was a nightmare and to save my sanity and possibly me loosing control with him I followed the cc In Toddler taming. He was 16 months.
It was a two night battle and then paradise. He was much happier and calmer going to sleep as he realised the rules were tea, bath, story, cuddle, sleep in his bed.
It was s miracle.
The other 3 were sleep trained from 9 to 15 months and as a family it worked for us.
They are all happy settled lovely adults. 
Just remember you are the adult and you can take back control. 