My preference is to use both NASB and NKJV. The NASB (New American Standard Bible) is a literal word-for-word translation and retain as much of the original grammar and sentence structure as possible. In addition, the KJV (King James Version) and the NKJV (New King James Version) are also literal, but if we compare them to the NASB, the NASB is the most literal.
Each translation has its own strengths and weaknesses. For the King James Version (KJV) you’ll need the dictionary because it uses language typical of the time it was translated (1611). The New International Version (NIV) tries to make the text as easy to understand as possible and is a good reading Bible, but not a good study Bible. There are many other versions such as the NAB (New American Bible), NLT (New Living Translation), etc. These are all good translations. Again, my preference is to use both NASB and NKJV.