Before suggesting any particular AC, I would like list out the points to be taken care of before selecting an AC -
This depends on the floor area to be covered. What is a normal calculation followed is for an area of 120-140 Sq.ft you need a 1 ton, for 140- 180 Sq. ft, it will be 1.5 ton and for an area of 180-240 Sq. ft you will need an AC of 2 ton capacity.
Pay attention to EER ratings provided by BEE. A model with more stars will consume less energy.
Type of AC
Decide on whether you want a Windows AC or Split AC. Windows ACs are cheaper . But split ACs, though costlier , are more modern in looks and quieter in operation .
Better features and more star rating will mean higher price. An increase of one star will see an increase of around Rs.2500 in price.
Ensure that the AC you select has an adjustable thermostat. It should preferably have at least two cooling speeds.
After sales service
Choose a brand with better service facilities at your location. Since ACs require constant servicing to be able to give trouble free operation, after sales service must be the most important point to be considered.
Now having said that rather than giving you a list of my favourites , I prefer to offer you a link to compare the best ACs in terms of better star ratings. I am forced to give you the link because the term " best" is relative and also since I don't exactly know the capacity of the AC you are looking for. So here is the link - https://www.bijlibachao.com/top-ten-appliances/best-air-conditioner-ac-window-split-hitachi-lg-carrier-samsung-electricity-consumption-tonnage-in-india.html
Please note that this list is based solely on EER ratings from BEE. Consider other points as pointed above before choosing the best one for you.
Live....and Let Live!