Amanda Carrol prefers 'fast mediums' and her command unit is entirely such mechs. Pre-Crimson Languar, it leaves us with something like a Shadow Cat, or maybe a Stormcrow, as leading contenders, though it could be anything, or even change from time to time. Samantha Kline almost surely pilots a Warhawk or Summoner, or just very possibly an Adder, since thouse are the only three omnis her Kindraa makes (or made) and the warriors are noted to have a lot of familiarity with them, leading to PSR bonuses, indicating that typical Klines don't tend to take other omnis even if they have the chance. Garett Sainze pilots a mech with MASC, at least as of FM:CC, because the entire command star is thus equiped. That would tend to indicate a Shadow Cat or an Executioner, but its not out of the qustion that the Kindraa leader of the largest Kindraa has been able to pull some strings to have MASC put on some other mech, since he know that the Hellions did it for some lowly bondsman's Pouncer (see TRO55U). The Beyl-Grant second in command Dora Beyl pilots a Scytha fighter, so its not a bad pick for Bodee Beyl, either, since it shows that its a respected enough ride in the Kindraa, but its the most of a guess of any of these.
There was a canon senerio that pitted the Mandrills against the Scorpions and depected many of the Clan leadership (in as much as such a thing exists) but I have almost no information about it, having not been there. Someone who was may be able to answer as to the verious Mandrills' rides. You may want to start a new thread to attract attention if you care enough about it.