Let's see... most of what I would have said has already been said, but let me echo a few points.
I agree with others that a versatile fighter would be most useful here. I while back I had built one, and here's what I found...
1. Don't worry about ranged feats, you'll use them too infrequently and the feat is better spent on something else.
2. Unless you are dead set on using a heavy shield, use a buckler, not a light shield. Shield bashing is a near-worthless endeavour, and giving the bash up for the use of your off-hand (not just for attacking but for anything... downing a potion, shooting a bow, etc.) without having to put away or drop the buckler is well worth it.
3. Your best armor choices, once you can afford them, are Chain Shirt, Breastplate, and Full Plate. If you can get it in mithral, that's even better.
4. Your basic modes of combat are: One-handed weapon with buckler, One-handed weapon with light weapon, Two-handed weapon, Reach weapon, Two-handed ranged weapon, One-handed (or light) thrown weapon with buckler. Some of these modes can be combined. You should carry enough weapons to cover all these situations.
5. As for feats, personally... Quick Draw is essential, as it allows you to quickly switch between weapons. Power Attack helps quickly put down high HP, low AC adversaries. If you get Cleave, you might as well get Great Cleave, which, in conjuction with Power Attack, will let you chew through low HD creatures like you wouldn't believe. Combat Reflexes combined with Great Cleave has the potential to let you take down many opponents outside your regular turn, but only take if you have a very good Dexterity. Outside of those, it's just a matter of what style of fighter you want. I'd stay away from the Spring Attack chain. That's more for monks and duelists than front-line tanks. Stay away from the Whirlwind Attack chain, Great Cleave and a high BAB, will do the same job better. Combat Expertise, Combat Reflexes, Improved Initiative, Point Blank Shot, Precise Shot, Two-Weapon Fighting, Weapon Focus and Weapon Specialization are useful feats at later levels.
For a heavy fighter, I'd concentrate on versatility (Quick Draw and Buckler), then high damage (Power Attack and Two-handed Weapons), then high numbers of attacks (Great Cleave and TWF). Get in close and tear them to pieces. Keep them busy, so the spellcasters and archers can shoot them up from safety.