I've been looking at a lot of options for both swashbuckling and SWF. Here are some of the builds I've considered:
For the mostly bard options you've got:
A pure cha based purple dragon knight bard with orb in the offhand will have OK melee capability; decent defensive capabilities with 70+ PRR, 23% dodge, and good will and reflex saves with evasion (both 60+); and solid CC with a 55ish DC Otto's sphere (before debuffs such as mind fog).
A 16bard/2fighter/2rogue cha based purple dragon knight bard with buckler in the offhand trades 2 DC for some solid melee capability. It ends up with about 20% more doublestrike than the pure build; solid defensive capabilities with 90+ PRR, 27% dodge, and good will and reflex saves with evasion (both 60+); and solid CC with a 53ish DC Otto's sphere (before debuffs such as mind fog). So far, I think this is the best option of any of the builds I've worked out. It has an excellent combination of offense, defense, party support, and CC ability.
The following build only uses bard for swashbuckling and attempts to maximize the benefits of it and SWF by pumping str:
Human 12fighter/5bard/1cleric or FvS (leaves you with 2 more levels to spend, I like 6bard/2FvS personally) with a buckler in the offhand. Go for the tier 5s in swashbuckler, power surge in kensai, and cleric or FvS for divine might. With 200% stat boost to damage from GSWF and a str in the 80s, 30% doublestrike, the crit profile from swashbuckling stance and exploit weakness, this build may very well offer some of the highest dps in the game. But the defenses are significantly lacking. It can get a solid PRR in the 80s and around 23% dodge, but the saves will be useless for EE no matter what you do. Also no inherent incorp or displacement. Of course items/clickies can help with incorp and displacement, but nothing is going to make up for useless saves. They are this builds biggest weakness. Feithlin has already posted a
12fighter/7bard/1cleric variation of this build that includes a ranged option.
Then there is the SWF build that does not utilize swashbuckling:
Bladeforged 12fighter/6monk/2paladin with orb in the offhand. This build trades some of the offensive capability of the build above for solid defense. It has all the defensive capabilities that come with a bladeforged 6monk/2paladin - shadow veil, solid saves across the board, good PRR, dodge, recon SLA, etc. Offensively, it loses about 20% doublestrike as well as the benefits of swashbuckling stance.
You've also got some melee artificer options utilizing SWF, swashbuckling, or both. Any of these builds, however, will need to be mostly artificer since rune arm dps scales with arti level. I think this will offer an improvement for melee artificers, but I still don't consider melee artis optimal in any case. I elaborate on these options
in this post from another thread.
There are probably also some melee/caster hybrid options for both arcanes and divines, but I haven't looked into any of those.