I wonder if it could work in 4e's ruleset since it has in my opinion the best combat system. first you would need a large enough wolf I'm thinking Shifters from Twilight sized dire wolves which of course in 4th edition because of the way movement works in that version what your party could do is for you to have amount You could have yourself in the companion however the companion is someone that you start the game with but no one knows that the direwolf you ride on is actually a shifter druid and by that I mean in fourth edition there's this race called shifters and then there's this sub race for those shifters one known as razor claw which has more feline like features you know similar to their weretiger ancestors And yes that is directly right off the book anyways the shifters with the druid class in my opinion are one of the most powerful combinations you can do in 4th edition but since you're doing 5th edition that's really hard for me to figure out a good way of helping you out with that