Ol' Willy
Arcane
Also implantsEven without the exploit, the player could increase the perception three times in Fallout 1 (I even linked you to the page that gives extensive info about the trait that temporarily raises the PC perception stat under specific circumstances, I guess you could use some good old Mentats my friend), a bit less in the second game, right after leveling up so they can select the aforementioned perk.
If you start with 4 PER you can get +1 by Gain and then +1 by implant
If Kamikaze is selected, this nets 6x2 +5 = 17, which is not bad at all