The Chofetz Chaim when he referred to scissors was not discussing an issur l’halacha, because he would not argue on the Gemara and Shulchan Aruch. He NEVER discussed an electric shaver, as it was not yet invented when he wrote Likutei Halachos. More likely he meant the safety razor which was the newest innovation in shaving in his days. This is what your wife uses to shave her legs and it is certainly a ta’ar. He “frequently admonished about shaving the beard year after year” yes, with a razor.
Reb Elyashiv’s issur is based on the misunderstanding that the Likutei Halachos refers to an electric shaver.
Reb Yaakov Kaminetzky is not true according to his son.
The Chazon Ish equates a shaver with powder, which is not a halachic issue. Reb Chaim Kanievsky is quoting this and is obviously also not discussing a problem in halacha as is obvious from the context where he writes that it was learned from goyim. The story about ink is very questionable, because the guard would scrape off ink but have no significance to hair.
Just a few examples to show this cut-and-past list is totally irrelevant.