I've used an Ortofon OM-20 and the OM-30 on the 7.5g tonearm on my TD-147. Both tracked well and sounded good. I have to say that I like my Denon DL-301MkII much better though. But being a low output moving coil cartridge, it requires a bit more from the phono stage. I'm currently using a step up transformer + a Budgie phono amp.
I've found that Grado Prestige cartridges can also sound quite nice on this tonearm. I bought an extra arm wand and go back and forth between a Grado Gold 1 and the Denon. The Grado may have a slight edge over the Denon on voices but the Denon beats it handily on detail.
The Ortofon OM was my go to cart for several years. I view the 20 and 30 to be "jack of all trades" cartridges that do everything at least pretty well (I've never heard the 40). On my TD-147, I'd put the 301MKII firmly in 1st place with the Grado second (based on it's good midrange) and the Ortofons third. If I listened to mostly rock, I'd move the Ortofons to second place. To my ears, OM does electric guitar better than Grado Prestige 1 carts (there is a newer Prestige 2 out now that gets good reviews). Of course, your mileage may vary.
BTW, welcome to AK!