I'm not a "KJV only", but you will think that once you hear what I'm gonna' say.
For English speaking peoples, the KJV is still the most 'accurate' translation. Notice I said 'translation'. There is no translation that is absolutely perfect, so one should never get into that debate.
The 1611 KJV Bible was translated from the OT Hebrew texts, and the NT came from Greek manuscripts which can be dated through quotes by the early Church fathers back to Antioch where the word Christian was first used. These Greek manuscripts still make up the Majority of Greek manuscripts today (in the thousands), and are called The Majority Text, or Received Text. They make up what is known as the Traditional texts of the New Testament. And they have much agreement with each other. The KJV translators wrote a Letter to the reader, and to King James, explaining the difficulties in the translation, and what all manuscripts they relied on. And they made a clear distinction about no connection with a pope or the Roman Church.
But just like everything else in this world, Satan tries to corrupt what belongs to God and His people, God's Word included. Why do you really think the 'higher critic' has appeared for the latter days pushing corrupt Bible versions from completely different Greek New Testament manuscripts whose origin back to the early disciples has never been verified? Such is the so-called Critical Text which was introduced in the 1880's in Great Britain.
In opposition to the Majority Text, the 19th century British scholars Brooke Wescott and Fenton Hort pushed their Greek translation from certain Alexandrian manuscript Greek texts they claimed were "older and better" than the Majority Text. These involved the Codex Vaticanus which was first discovered in the Vatican in 1475 from an unknown origin, and the Codex Sinaiticus first discovered by Tischendorf in a Greek monastery around 1850, of which its origin also is unknown.
So how can the 'higher critic' that pushes that newer Critical Text make a claim that it is "older and better" than the many earlier Bible versions of history based on the Majority Text? (Yes, there were many previous Bible versions based on the Traditional text prior to the KJV.)
I recommend those who really want to look into this, watch the following scholarly documentary...