Austraila - Maybe - Austraila Has Tim Paine & Carey currently and they haven't impressed a lot just yet
New Zealand - No - Tom Latham and BJ Watling as a backup. Although some might say yes because Tom Latham doesn't perform consistenly. Oh wait... Sarfaraz has the same exact problem but even worse
India - No - Even after Dhoni retires India has Pant & Dinesh Karthik
South Africa - No - De Kock is too good
England - No Way - They have Bairstow and Buttler. Sarfaraz ain't gonna beat those two
Sri Lanka - Dickwella is going well so no. But maybe in test format yes (I'm not sure though since I don't know a lot of Sri lankan wicketkeepers currently playing).
Bangladesh - No - Mushfiqur, in my opinion, is better than Sarfaraz.
Afghanistan - For a moment I thought this was going to be the country where Sarfaraz will get into but I realised Afghanistan has Mohammad Shazad so no
Zimbabwe - No - I have been impressed with Brendan Taylor this year.
Finally...
West Indies -
Yes but not all formats - For T20s, I would prefer Sarfaraz over Dinesh Ramdin. Test Format, its 50-50 with him and Dorwich. Dorwich hasn't been that bad so not sure about Test format but ODI either no (keep Shai Hope as ODI wicketkeeper) or give that wicket keeper to sarfaraz (which means an extra batsman for the WI ODI team). This also lets Shai Hope focus on his batting more