Infographic is definitelly misleading.
First of all, even if there’s 5 mons of each type it doesn’t mean all 5 are viable. Ho-oh? Drifblim? Jynx and articuno, muks, aggron, empoleon? At least all of forementioned is not a good option at all at least for now. For empoleon things may change for example, after CD.
Second: your infographic suggests that there is straight decrease in power level or viability from first ti last. And that’s strictly wrong. In actual encounters pinsir can outperform scizor; weavile have encounters where he’s not only outperforms tyranitar in dps, but also in things like ttw; as for electric zapdos is usually worse than both electivire and magnezone; hariyama-breelom-machamp is one complicated trio, where all three can be best option than other two, but machamp usually leads; fire is complicated too, against glassy heavy-hitters blaziken falls off and moltress/entei have their time to shine, against bulkier bosses blaziken can compete with moltress; ho-oh is BAD; there are only two ‘true’ ghost attackers: gira-o and BOTH legacy gengars, not just lick one, but he’s easier to get, while hex is only option that currently avaliable and not so far away for ones without gira-o and legacy relatives, banette is for hopeless or for extreeme lovers only; dragon is probably worst one: first of all dialga is not better in general(generally its on dragonite level) its great specialist for upcoming raids on likes of kyurem, on bosses where you want rayquaza but don’t have one the best alternatives are legacy salamence AND palkia(palkia is great even with ‘bad’ moveset) and I can’t tell for sure about relationship between dialga/dragonite/garchomp in general; glaceon is not strictly better than weavile, but really good and easier to get; water first 3 is highly dependent on encounter and in month and a half swampert will change water balance almost for suren for steel there is only two viable options: mm metagross and dialga.

Gamepress calculator is too vacuum to be true.

With all wall of text above, I almost forgot to say, that format itself is nice and outside of the charts themselves is good. The problem is that you cannot always rank mons with just single metrics. But overall, really good work.