Goodman<<<<and "most grammarians accept "t
here was/were a television, a radio, a sofa and a table" >>> I guess I am not a grammarian.
I personally won't say "there were a television.."
No, I didn't think you would. To a grammarian, there is more to it than the next word. There are at least three views on this.
1. The rule of proximity: The first word after the verb is singular (a television), so a singular verb (was) can/should be used.
2. The rule of number: If only one thing is mentioned, use a singular verb (was); if more things are mentioned, use a plural verb (were). I remember a British graduate of Oxford University who lectured on English Philology at Helsinki University and was an enthusiastic proponent of this rule. He considered was wrong in cases like this. Similarly, he considered media is and algae is always wrong as well. I use the past tense because he is no longer alive.
3. Liberal grammarians, who don't really care which one of the above rules is applied. (As I said, I'm one of them!)
CB