It depends on the task. E.g. FoxPro 2.6 is basically proto-RAD, complete with visual form and report designers and an online help system, but it's too high-level for systems programming. Borland Pascal 7.0 is probably the sweet spot of power and convenience - no visual designers, but you get Turbo Vision for TUI, a very nice integrated help system, and decently powerful object-oriented language. Better yet, early versions of FreePascal that targeted 32-bit DOS.

I don't think any of these would fit on a floppy, though; you'd have to unwind a little bit for that. Say, Turbo Pascal 5.5?