Aside from the loss to Roddy at Final Battle, Davey's undefeated in singles over the grading period I believe, and he avenged that loss to Strong at HTCS1.
RVD doesn't lose much, but he doesn't win a lot of big matches either since he came back from being carved up by Abyss. He tends to find himself in Double Countouts or being the one not pinned in multi-man matches. <_<
RVD will be Top Five though to be sure. That sort of win-loss record, plus a World Title, plus being active over the majority of the timeframe is good enough for that.
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Thank you, Eddie Guerrero.
http://i.neoseeker.com/n/2/nintendo_quality_seal.jpg