Crimson Longinus
Legend
Any Halfling being stronger than any Orc isn't necessarily a problem, I already explained this in length in another thread.Which is already they case.
Both races max out at 20 STR, so they have the same upper limit. A halfling that puts a 15 in strength is stronger than an Orc that puts a 8 in strength and raises it to a 10.
If any halfling being as strong or stronger than any orc is a problem, it is one you already have to deal with. The real truth is, most players won't take an Orc and put an 8 in strength, or a halfling and put a 15 in strength, because they are far better served playing into the races bonuses than fighting against them.
That Halfling Barbarian will get Str 20 at level 12, when most campaigns end and characters are becoming mythical heroes unfettered by realism. But for starting character that two point more matters. If one person makes a max Str orc and another max Str Halfling, the Orc will be stronger. The Orc's role as 'strong person' cannot be matched by a Halfling.