Treantmonk's guide to bards recomments grease and silent image in general as first level spells, but incorrectly repeats the 3.5e behavior that grease makes people flat-footed - it does not. In general, if your level is never going to go up, then you want to avoid things with save DCs, caster levels, or that otherwise scale with level, because they will become obsolete shortly. Unfortunately this includes grease and silent image - you MIGHT be able to get away with silent image depending on how much slack your GM gives you, but you may want to go with some more self-affecting spells. And there's a bunch of them!
I'd base your spell selection on the type of campaign. If it's urban/espionage/etc. I'd be tempted to take disguise self, Innocence (APG), or Shield Speech (Taldor, Echoes of Glory). Borrow Skill (APG) can be used to use one of your party member's skills for a check, which can really help in a lot of situations. Comprehend Languages never goes out of style, in a game where the GM doesn't just handwave languages all the time. Detect Charm or See Alignment for a game with a lot of demons and stuff (Wrath of the Righteous?) and Detect Secret Doors and Lighten Object (Faiths of Balance) for a heavy dungeon game (Shattered Star?).
Expeditious Retreat and Feather Fall will always be good for the reasons you cite. As a swashbucker, Weaponwand (Inner Sea Magic) could have some interesting options; for normal bards they're unlikely to melee enough for it but it could provide you with a rabbit-punch secret weapon. Feather Step (APG) will be very helpful in getting into flank.
Edit: The OP clarified that he'll be playing Rise of the Runelords. For RotR it will be low on the espionage but everything else will be valuable - I'd definitely take Comprehend Languages. There's lots of wilderness and dungeon, and lots of not so bright opponents (goblins, giants) to where, if you have an illusion-friendly GM, illusion could be feasible. And it's treasure poor and there's not a lot of custom item ordering opportunities. In that case I personally would go Comp Lang and then Ex Retreat or Feather Fall, especially in conjunction with a swashbuckler type. Comp Lang could be good wand-bait if you think the Silent Image route will work.