Can you name names?
Yuckmouth=I got 5 on it=Get Out (cultural impact)
Scarface-nothing to be said
E 40-nothing to be said
Sure. Master P bit:
OutKast (Hootie Hoo),
2Pac (Krazy was his Shyne),
Cash Money (P claims he owns the name Hot Boys),
E-40 (I have to give P a pass on this one, because his time in Northern Cali may have influenced the early No Limit sound)
Those are the only artists that P copied who I can say had as much of a cultural impact as Master P.
I'm not enough of a Master P fan to know how he bit Scarface (The GOAT), but I wouldn't say that either of the Luniz (Yuk or Numbskull) have made as big of an impact as Master P with their independent releases or Yukmouth's solo catalog.
"I Got 5 On It" is a classic, but that's where their legacy ends nationally. No diss, but even Tone Loc and Young MC got more burn out of their One-Hit Wonder status than the Luniz did, and Yuk even had J. Prince's backing for a long time.