As there are a lot of links at the moment, there doesn't seem to be a solid guide online for transfer reliability I've put the framework together for a source reliability. Source can be journalist specific or the outlet itself. If mods can clean this up as more suggestions are made, and not everyone will agree, that would be great.
Tier 1 - Excellent Source - Fabrizio Romano, David Ornstein (Athletic)
Tier 2 - Good Source - Pete Graves (Sky), Luke Edwards (Telegraph), Chris Waug