As its your 3rd car , and i am thinking that you will not be parting off with the other 2, you try for Petrol itself(Balanced running with 3, and swift you have is diesel).
My options as for sedan is-
1.Honda City-1.5IVtec
Perfect as a C segment sedan
2.I won't ask you for Ciaz as from 1.6 fiesta to 1.4 ciaz its not practical ,you won't be satisfied .If for ciaz go with 1.3 SHVS,its more powerful than normal 1.3 DDIS, Fuel economy is its merit.
For SUV-(Personally i would like you to add SUV as you have hatch-swift ,sedan-fiesta)
1.XUV500- Perfect SUV ,you have all features in hand.
2.Nissan Terrano-Premium SUV than Duster
3.Ecosport- Try either 1.5 TDci or 1.1 Ecoboost,both have good mileage.
4.Creta (1.6CRDI)- I am not an ardent hyundai fan,as these have best cosmetic appeal,and engine performance,but long term reliability is a concern,not to hurt any Hyundai fan , my opinion.
My theory- Rough use in Hyundai ,no problems .It will last for a limited time only.
Others like Honda,ford- With slight rough use itself car will start to trouble up.But if we give these care it will last for years.