Wolf deserves to be in the lower end of the high tier. Hes a great character, stick with him. He should be above pit for sure. Another thing; All the spaces are good characters in this game. In Fact, Spacies Have never been bad in any smash game. I think fox should be the slot right below wolf on the tier lists as well. Almost every area fox is weak in wolf is strong, and vice versa. They are good complements of each other in choosing what characters to play. They both got good traits. It comes down to your personal playstyle. Few examples of what I mean:
Ground game-Wolf>Fox(Besides fox's uptilt/upsmash)
Air game-Fox>Wolf(besides wolf's smexy bair)
Fox-Much better recovery
Wolf-Much Better Edgeguarder
Priority-about equal
Killing potential-about equal(Although foxs upsmash is godly, wolf has more, weaker options, giving him more flexibilty, and less predictability.)
Camping-Depends on your style. Do you camp to make them come to you? Or do you camp to cause damage at low risk? First one is fox, the latter is wolf.
Lastly, Fox and Wolf's matchup chart is very similar, with a couple differences, most notably in the matchups they get owned in. Wolf can avoid pika's CG early; Fox cant. However, DDD, Wolf's worst matchup, Cant chaingrab fox, and Fox vs DDD is at least 50:50, possible even foxs advantage. they both do well vs snake and diddy. Wolf doesnt have much trouble with luigi, a bad matchup for fox. Meanwhile, Fox is slightly advantaged vs R.O.B(55:45). Besides those and maybe one or two more matchups, they are almost identical across the boards(They go even against eachother too btw)
Mainly, It comes down to your playstyle. Basically, All the spacies are good in this game; Stick with them.