I am a mostly f2p player, other than yveltal (3rd raid shiny) and latias (first shiny legend ever). The 4 most recent are the legendary raids ive done recently and ive gotten a first raid shiny on each, also dex entry, kyurem was also a first raid shiny but was caught before yveltal. I dont know how im this lucky as ive done many other legendary raids before with zero shinies before the all out event.
I included dex entries for proof (the other seen kyreum was wild)
by Acceptable-Toe-1777