The US had already turned against Batista before Castro took power. There were plenty of other anti-Batista rebels than Castro. Although Castro achieved great reknown for his rebellion and hiding in the mountains, there were many other revolutionaries not associated with him.
Castro achieved power because he commanded an independent army and later became Prime Minister and then usurped the revolution.
Without Castro, it is still likely that Batista would still leave the country and anti-Batista forces took over. In our own timeline, the initial leaders of the post-Bastita government were people associated with the old Cuban democracy (as flawed as it was) with political liberal leanings and friendly to business. The Communists are never able to seize power and the Cuban government becomes a stable democracy that initiates social welfare and economic reforms, but is still friendly to the United States.
Cuba had the highest standard of living in Latin America, and life expectancy equal to some European nations. There was inequality and other problems, but nothing that moderate reforms would not have improved. Without the terrible effects of Communism, Cuba today would probably be a very developed nation and a member of the OECD.