I do think some here are still looking on the Bible as J.W's and fundies/Evangelicals do, as a unified whole, like a single Book. Now, now children, you KNOW it is not !
We see theology evolve through the O.T, and again theology and christology evolve as the N.T jogs along time wise, the Apostle Paul would not recognise the Christology in the Gospel of John as being exactly the same as his.
In the time between the completion of the N.T and the formulation of the trinity doctrine ideas had "progressed" some more.
To use the very anthropomorphic idea of god from early O.T writings, or even early N.T ideas about the risen Christ to "disprove" the Trinity makes no sense.
Unless you believe in Sola Scriptura in a very literal way, but one who does that is again ignoring the evolution of ideas we see in Scripture.