OP what i think you need to do is sit down and make a list of attributes that made you like Young Link.
That way while your trying out different Brawl characters, you can go through this list and see who does and doesnt fit the bill. Let me give you an example;
I love mulitple jumps. I work with them primarily so heres what i did.
I choose Dedede as my main. All my seconds are as follows;
Kirby
Meta Knight
Jigglypuff
They all got one thing in common, they all have multiple jumps. But as i continued to play them i found OTHER things these 4 had in common;
Bair Wall of Pain.
Dedede, Kirby, and Jiggs got a really excellent back aerial that can be used to WOP.
Fair for damage racking;
Jiggs, Meta and Kirby got a good lagless Fair used to follow ups.
Chain Grabbing;
Dedede and Kirby got different but good chain grabs. Obviously im talking about the Gonzo combo for kirby [fthrow,uair sometimes standing dthrow]
Also Jiggs and Kirby have a similar Dair, only differance is Kirby has more start up lag and alittle bit more knock back. Whilst Kirbys Fsmash has more range compared to Jiggs. But they work almost the same way.
One thing I love about all 4 is their Nair's. Jiggs, Kirby, Meta and D3's Nair are great for comboing. Dedede's Nair can KO off the top if fresh and Meta's can also kill if the strongest hit connects. Jigg's Nair can be used to push a recovering enemy away from the ledge if Jiggs can get herself between the ledge and the opponent.
For the things all 4 do differently; thats really the other reason why i get on them. They have different tilts, throws, jabs, specials and sometimes smashes. Depending on the different tools all 4 offer, it allows me to have flexibility. It allows me to control the stage differently, and lets me mix up my match ups quite a bit. I dont use Meta for everything, because to be frank im not comfortable using him against some match ups. I'd rather face another Meta on my D3 then use my Meta.