I have thought of 3 entries, please consider them
Water/Dragon Clawitzer, Dragon Pulse gets STAB and loses Grass/Electric weakness for less commmon weaknesses.
Magic Guard Chatot, loses the SR weakness, no recoil Life Orb, immune to status, it can be one of the best wallbreakers in tier w/ Nasty Plot and just craps on stall
Brave Bird Fletchinder, can now hold CB/LO, yeah
Thanks for reading!