Latias and Latios resist almost every single common move Nape carries besides HP Ice which doesn't do that much, and both Lati twins can outspeed and OHKO with any STAB move or Surf.
Tentacruel can take down Infernapes not carrying Earthquake or Thunderpunch, and I beleive it can take both of those just not comfortably.
Conkeldurr - Conk can take at least 1 hit from Nape and smash it with a Drain Punch, or revenge it with a Mach Punch.
Infernape is a frail Pokemon and most unresisted priority moves will take it down, even some that aren't resisted. Infernape has trouble with most everything that ouspeeds it, such as Alakazam or Starmie, but those are offensive counters and are only good for revenging Nape.