The whole Bible is about Jesus.
And this is constituent to your argument that we don't need the Bible? You will find it is impossible to argue against the necessity of the Bible without referring to the Bible, or otherwise essentially declaring yourself a prophet, which you would verify referring to the Bible designating the ministry and enabling of the Holy Spirit, as described in the Bible. Unless, of course, you want to simply be so audacious as to simply assert that, and then you can join the ranks of the antiquated and contemporary false prophets and say whatever you wish with the pretense of authority.
If you have Jesus you have the Bible in your heart. True Believers have the Bible is written on their heart and mind.
If this were true there would not be shepherds and teachers as inferior ministers of what the Holy Spirit is already doing without, in God's providence, human intervention (Ephesians 4:11-12). We wouldn't be commended that "All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness,
that the man of God may be complete, equipped for every good work (2 Timothy 3:16-17)," because the man of God would be "fully equipped" without the Bible. After all, why even say this? Why write anything after Christ's ascension if this were true? Because it is not, and operating without full accountability to the Word of God is dangerous for you and anyone who listens to you while you are walking in this manner.
The Bible is a useful resource for teaching, rebuking, verifying Truth, but not necessary. All you need is Love. To love God and love others. That sums it up! But Love comes from God through a relationship with Jesus.
The reasons you establish for the Bible's "usefulness" here actually demonstrates why it is necessary. If the Holy Spirit has been assigned by Christ to be sufficient for our Christian walk apart from, ironically, the Holy Spirit inspired Word of God then why do we need to teach, rebuke, and verify truth? Certainly the Holy spirit, if He decided to operate this way, would not need our cooperation. And certainly you do not think that verifying truth is merely "useful." Jesus and the apostles also used the Scriptures to demonstrate that Jesus was the Christ (Luke 4:14-21, Matthew's countless quotes, Acts of the Apostles 17:2-12, 1 Corinthians 15:1-4), showing us that the Holy Spirit is not rendering obsolete or unnecessary His inspired written Word in the work of salvation and verifying Jesus' Messiahship.
We need the Bible to establish collective accountability of the saints and thereby preclude self-confident self-determination (the purpose for which we practice 2 Timothy 3:16-17, 1 Corinthians 4:6), because, as aforementioned, it is the only means by which we identify false teachers pretending to the witness of the Holy Spirit. The Scripture is also necessary to equip us for every good work (again, 2 timothy 3:16-17), to prepare us for Christ's return (Matthew 24:25-44), to resist the devil's superior (as compared to ours) cunning (Matthew 4:4-10), and to give us vital insight into God's dealings with man through inspired historical accounts (Romans 15:4, 1 Corinthians 10:11), among other things.
In summary, the only person who doesn't need a Bible is the person who remembers their Bible. But then you have not eliminated it's necessity but, by practice, recognized how much you need it. Obviously there are special circumstances, such as a person who is unable to read or has no access to their own Bible, but such people, for the aforementioned reasons, need the nurturing and guidance of someone who knows their Bible well or can read it to them.