I can't watch TV. Little things pop out at me that make me want to run away from it. This is coming from a person who used to be completely addicted to watching TV, like an alcoholic with alcohol. But as soon as I was saved, I couldn't watch it anymore, and whenever someone asks me if watching TV or entertainment in general is a sin I have trouble not saying yes. But since the Bible doesn't say that it is, so I can't say that.
But to me watching TV is a sin. Why?
Because...
1. It distracts me from God
2. Causes me to be lazy
3. I could be doing many other things, like praying, reading the Bible, helping somebody that needs it, things like that
4. It's a waste of time
5. It causes me to be selfish and do things for myself instead of others
6. There are too many evil things on TV, and I don't want to see or hear any of it (and obviously God wouldn't want me to)
I can't say for sure that watching TV is a sin, or that EVERYTHING on TV is evil, but I certainly wouldn't recommend watching it.
I would say, don't just ask whether or not it's a sin to watch it, ask yourself, is it actually a beneficial to watch it? Is it helping anybody, or bringing glory to God? If you answer no to those questions, just don't watch it.
Here are some other verses to consider, along with the ones you already listed:
"I have the right to do anything," you say--but not everything is beneficial. "I have the right to do anything"--but not everything is constructive." (1 Corinthians 10:23)
"But mark this: There will be terrible times in the last days. People will be lovers of themselves, lovers of money, boastful, proud, abusive, disobedient to their parents, ungrateful, unholy, without love, unforgiving, slanderous, without self-control, brutal, not lovers of the good, treacherous, rash, conceited, lovers of pleasure rather than lovers of God—having a form of godliness but denying its power. Have nothing to do with such people" (2 Timothy 3:1-5 - I put this here because it sounds like a lot of things on TV).
"So whether you eat or drink or whatever you do, do it all for the glory of God." (1 Corinthians 10:31)
“The eye is the lamp of the body. So, if your eye is healthy, your whole body will be full of light, but if your eye is bad, your whole body will be full of darkness. If then the light in you is darkness, how great is the darkness!" (Matthew 6:22-23)
"Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is—his good, pleasing and perfect will." (Romans 12:2)
“Test everything. Hold on to the good. Avoid every kind of evil.” (1 Thessalonians 5:21-22)
"Let us behave decently, as in the daytime, not in carousing and drunkenness, not in sexual immorality and debauchery, not in dissension and jealousy. Rather, clothe yourselves with the Lord Jesus Christ, and do not think about how to gratify the desires of the flesh." (Romans 13:13-14)