Natsu from Baby Steps is one example of a perfect, pure waifu. She's the kind of girl you wish you could find, but never do. She's not a stupid bitch. She's not hypergamous, she's portrayed mostly modestly in that there's almost zero fanservice, there are infinite temptations but she never falters. She's more than just another cardboard love interest character who is into the cardboard bland protagonist for no reason. She has goals and pursues them. The male protagonist is dedicated and committed to improvement.

The only other example I can think of is Miho from Bakuman, but she's a tier below Natsu imo. Where are all the other Natsus? I'd prefer if the manga/anime didn't have any fights to the death or ecchi, but it's fine if they do. Just feed me more Natsus.

waifu doesn't mean what you think it means