Scarlettblue, for people who never invested into the game its very possible to have hiruzen, agk or susanoo itachi. Remember you get a lot of free frags, so even if you never pulled kage you are likely to have around 30-40 by now [active people who never skip draws and are here since late 2016/early 2017]. Regarding seal scrolls, its not uncommon nowadays for ftp to get around 4-5k cp per month, and spending those resources on great plates gives you around 80 seals per 10k used. Im mentioning this event because its relatively good power up event up to a certain grasp map level. Same goes for other events offering seal scrolls, but undoubtedly plates are the best source of them.

Btw. gaara recharge reward isnt instantly claimed and grays out if you dont claim it. This is also the reason that you actually never know if someone recharged or not. Not that it has any meaning except boosting one's own ego.

edit: noticed post about madara and itachi at once. It's harder but definitely possible. Hashi and itachi on the other hand... propably not.