There is a seriously disconnect between Mech heights in MW:O and Mech heights in actual Battletech.
In MW:O, the Jenner stands if I recall, just over 8 meters tall, wheres the Atlas is just under 20 meters.
this also demonstrates how ridiculously over-sized the Catapult is. The Catapult is less than twice the mass of the Jenner, yet has over 5 times the volume. Each leg on that Catapult, unless hollow, would mass nearly as much as the Jenner, and that is before getting to the 3 ton cockpit, 3 ton Gyro, 14 ton Fusion Reactor, etc that all sit ABOVE those legs. The Jenner is actually about the only correctly scaled mech in the whole game. (Speaking not just as an artist who knows proportions and volume scaling, but having worked most of my life with heavy industrial machinery and even around Combat Armor.). The lame excuse forwarded to defend it's sizing was that the "arms are mostly hollow" despite being over 7 tons of weapons, plus ammo, structure, armor, etc. Apparently,the designers of the Catapult WANTED to make it as easy to destroy as possible by oversizing it needlessly.
*facepalm*
Whereas according to the head of Battletech Line Development as Catalyst Game Labs, humanoid mechs range from 8 meters tall to 14 meters for the TALLEST (which, btw, the Atlas is NOT. The Atlas is the heaviest, but is noted as a very stocky and broad and powerful looking machine, whereas mechs like the Banshee are actually taller. The Victor is around the same height as an Atlas, for the record, just notably slimmer overall.), Digitigrade designs and Quads, by the lengths of their chassis, would overall be shorter than humanoids of the same weight, in most cases. A Tarantula, 25 ton quad qould be closer to 6 meters, for instance.
In other words, MW:O mechs are massively oversized on average, with far too much height discrepancy between them.
For comparison, is an admittedly dated size chart based off of some work by Adridos, I think (though I believe Tennex also did some of this stuff? I can't recall)
The top is the mechs by MW:Os scale, the bottom is closer to the "Official" (and realistically speaking, much more accurate scale when one actually compares heavy machinery and armor, you realize hat 65-100 tons isn't actually that huge, especially sinc emilitary designs avoid excess size since it simply makes you an easier target to hit.). The Middle is my "re-sizing mechs to PGI's scale, but more accurate compared to each other" scale.
That said, your scale is actually very close to right. For comparison to approximate size on how a Raven would really sit, just compare the body of your Raven (particularly in regard the cockpit) to the fuselage of an Apache Longbow attack helicopter, with legs attached.